Plasma TV problems
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 Usually plasma TV problems start with the screen. If the plasma screen is broken or crashed, it's not repairable any more .
It needs a new plasma screen replacement, which may cost you
more then the plasma TV itself. ( new screen run ..2 -3k in real life
.) Budget management !!!
Protection front screen (glass on front) can be easily replaced
and not so expensive as PDP panel behind it. If you have just
protection screen damage your screen(PDP panel) will work
without any problem . Plasma screen contains - aluminum base
and two pieces of glass with gas between them ( gas inside not rechargeable ).
Pixels with gas , controlled by small electrodes . Each pixel
contains 3 colored sub pixels : they are green, blue and
red. Plasma screen works in 2 steps:--- gas ignition --- picture development IGNITION - power supply >logic control > Z or X sustain,> screen PICTURE DEVELOPMENT - power supply>,video control board or scaler > ,logic control board>y sustain > x sustain > buffer boards >screen Common problems with plasma panels - electrodes damage inside, change gas parameters, drivers on ribbon connectors damage. TYPICAL bad PLASMA SCREEN symptoms 1 Flashing red dots or pixels on the screen when it is cold (after warm up it goes away ) - bad screen 2 distorted colors on part of the screen - LEFT OR RIGHT CORNER -BAD SCREEN 3 COLORED VERTICAL LINES ON PICTURE 4 flashing red dots on some part of the screen 90% SCREEN PROBLEMS - NOT REPAIRABLE 10% ON PANELS 42V6 AND 42V5 (YOU HAVE a CHANCE)
Burn-in image:
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This is an Image you can see on top of the normal picture. It's
usually displayed as dark lines or a dark area on the screen. Burn-in
image developers: TV in-service in airports, libraries,
restaurants, hotels, security networks, bars, all public places.
If your plasma TV displays an image that's not moving (static
image) for a long time, it will develop burn-in spots. This
issue is not repairable and you will need a new screen (PDP
panel) . That's why for all those restaurants, bars, and public
places, it's better if you use an LCD type TV, not a plasma. For
example, a Panasonic plasma TV was in a King County bar for 6
months on a sport channel and it developed a burn-in sport
channel image. The estimated cost for this type of problem
would be $2,500.00. Be smart and save your money !!!!
Vertical or horizontal lines or bars - 2-3" wide:
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There is 60% of chance you will need a new screen. The problem you
may have is dead driver (part of a screen) or poor connection
between plasma glass and ribbon wire connector. There is some solution
for it but not for long time. PDP panel and address driver on it
not separated. If one of 26-40 drivers is going out, you need
new screen. It is a real question why manufacturers don't
separate expensive PDP panel ($2000 and more) and $40 driver
IC on it. It is easier to replace a small $40 part than the
entire screen. So far they just ignore this issue. Future
plasma panel will be aluminum + glass + gas only.( no more
drivers on it ) Other common problem with lines on screen
-- buffer boards , high ammount of failure for these boards
due to poor electronic design 1-- voltage needed to operate controllers on buffer board just to high for small SMD IC ,2--- they are not strong enough to drive address electrode). In future it will be changed for more reliable parts .
Other problems
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| Power supply: The
most hard working board in a plasma TV, it develops voltage to
supply all components, high current + high voltage. Input fuse is 10
A. Not so many TV's in TV history use input fuse - 10 A.
Very sensitive for input AC voltage and output DC voltage.
It is a good idea to check your electric outlet before
you hook up YOUR plasma. Perfect electric connections are
the second major rule for plasma. A real example – a Sony
42" plasma was in service on sparking electric plug in
apartment. The result: dead power supply, wiped EEPROM memory,
and a repair cost of $470. Save your money: ---don't use cheap extension cords, ---open wires, --- 100-year-old electric outlets. Keep in mind that plasma needs twice as much input current as any TV on market. Common power supply problems: - hard to turn on, - stops working after a while, - does not turn on at all, - flashing pixels on screen. | |||||
| Logic control, X, Y sustain, buffer boards: controls picture, fires the gas, and many others functions. Common problems include negative image, no image, vertical or horizontal stripes on picture, turns on and than turns off, and many more. Technically they are complitely new electronic devices, nothing before built to compare with.It is always better to relace both sustain boards on any models (on SONY,TOSHIBA,LG you must - no choice). | |||||
| Care: - cooling system (if it's not installed by manufacturer) - good electric plugs - don't leave plasma on one channel for a long time (2-6 days) - magnetic fields does not affect on plasma screen like on older TV's - don't use plasma TV on the same electric line with other powerful units such as vacuum, electric motors, plasma cutter , welding equipment. - NO ELECTRIC GENERATORS - ANY TYPE ANY BRAND (PLASMA IS VERY SENSITIVE TO INPUT AC VOLTAGE) !!!! | |||||
| Major brand or "exotic" brand name? Major companies build their own product, their own components, and have their own electronic design. They have experience customer support. They drive electronic industry forward. They spend money on a research. They know what they doing. "Exotic" companies - don't (they do - copy and paste!!!!!!) LED TELEVISION REPAIR THERE IS NO BIG DIFFERENCE BETWEEN LED TV AND LCD TV REPAIR . SAME POWER SUPPLY , MAIN BOARD ,T-CON AND LCD PANEL ON FRONT THEY DON,T USE INVERTOR BOARD ANY MORE AND CCFL LAMPS INSIDE LIKE IT WAS ON LCD TV . 256 OR MORE LED DIODES LIGHTS UP YOUR LCD SCREEN INSTEAD OF 6-10 CCFL LAMPS. YOU GOT BETTER BALANCE BETWEEN BLACK AND WHITE ON PICTURE AND SMALLER ELECTRIC BILL. LED TELEVISION IS SIMPLIFIED VERSION OF LCD TELEVISION . DOES NOT REQUIRED ANY SPECIAL KNOWLEDGE ( IF YOU ALREADY KNOW HOW LCD TV WORKS). USE LESS ENERGY AND HAS A LITTLE FASTER VIDEO PROCESSOR. | |||||
LCD or PLASMA?
- no overheating problem Technically LCD. - no burn in image problem - low electric bill - not so many hard working parts - proven technology - twice as light plasma tv failure symptoms ------------------------------------------------------------------------------------------------ no power POWER SUPPLY hard to turn on BOARD no power light on front panel STAND BY POWER turn on after 20 min BOARD turn on and immediately shots down flashing pixels on screen turn on but no video and sound negative image tv turns on and shots down in 2sec X or Y or Z flashing pixels on screen dark image SUSTAIN BOARDS has sound but no video screen goes black and then return to normal picture vertical color lines on screen no video vertical color lines with video vertical bars on screen horizontal lines on the image picture goes red after while just left part of screen working just right part of the screen is working LOGIC CONTROL vertical and horizontal lines on screen part of screen not working some functions not working BOARD no video but has sound functions not working at all turns on and shots down no video ,no sound BUFFER BOARDS part of screen not working black vertical bars on screen smell burn changing in size vertical colored lines horizontal lines white or colored no video from one of the inputs no sound no video but has menu lettering on screen AUDIO / VIDEO MAIN some channels not working properly just '' snow '' on screen BOARD no video but has a gray colored screen wan,t to turn off picture distorted after while intermittent sound wan,t bring the menu on screen shots down for no reason dark image on part of the screen burn in image static image from previous seen channel or show PLASMA PANEL clears in few minutes turn on and shots down flashing red dots when it is cold (PDP) intermittent change of colors or brightness Plasma TV contains a few dangerous voltages that can electricute you in seconds . v s = 203 volts,v a =173 volts, Don't feel like you can walk on the water , better pass it to experience technicians, there is no parts inside need your attention and no parts easy to replace. new !!!! Some Real Repair Cases in Real Life in our Shop PLASMA AND LCD TV REPAIR TIPS panasonic 42" plasma REPAIR tv turn on , got picture and turn off in 5 seconds was found - line +15 volt from power supply to main video board after 5 sec overloading and send power supply to protection mode. bad left speaker (unusual case, one in 6 years). panasonic plasma 50" tv works on HDMI input only ,no others input ,front panel buttons not working at all, on remote control on/off only was found - missing software on internal flash memory bad tuner board maxent lcd tv 26" REPAIR tv turns on and got crazy vertical lines on the screen was found - microprocessor on main board loose connections on bottom row solution - hot air soldering station ( reballing) PIONEER 50" PLASMA REPAIR pioneer 50" plasma older model with separate receiver box tv turns on and got bright green flashing screen was found - Y sustain board working out of control bad SMD MOSFET 30n60 Philips 42pf7220a/37 REPAIR tv turns on and off in 2 seconds , no picture ,no sound was found - missing Vs voltage from power supply bad connection under plastic connector c221 Element 32" LCD TV REPAIR TV TURNS ON ,no video , no sound was found - +12 v in real life just +8.5v , +24v just 15volt bad optocouple in power supply . PHILIPS PFL37XXXXXXX LCD TV REPAIR tv turns on ,got picture ,but shots down for no reason in 20-40 min found - signal "turn on /off "develops on microprocessor for no reason bad front panel infrared sensor board (SMD capacitors are leaking) ---------------------------------------------------------------------------------------------------------------------- VIZIO 42" LCD TV REPAIR MASTER AND SLAVE INVERTOR BLOWED UP AFTER FEW DAYS(2-10) BD9897 BLOWED UP 4 TIMES ON SAME TV IN 7 DAYS FOUND start voltages and current to high for this schematic (poor design) ,CCFL lamps changed internal parameters after 2 years of work.(need a bit more current to start and run) CURE ---- installation 2 resistors,1 capacitor and 1 zener diode to lower start current ----------------------------------------------------------------------------------------------------------------------- SONY KDL-40V2500 lcd tv REPAIR Turns on for few second ,screen lights up ,and shots down Found bad transformer on invertor board (upper board) new transformer solved the case. ----------------------------------------------------------------------------------------------------------------------- VIZIO P42HDTV10A plasma tv REPAIR No picture ,no sound ,screen does not lights up Found burned yppd-j018c on y sustain board and open fuse 4a new IC solved the case ---------------------------------------------------------------------------------------------------------------------- VIZIO GV42L HDTV LCD TV REPAIR no picture ,no sound bad main board changing ic u11 solved the problem ------------------------------------------------------------------------------- HITACHI 42HDT52A REPAIR doesn,t turn on bad ja05958 main board changing ic i106 solved the problem ------------------------------------------------------------------------------- LG 42" LCD TV REPAIR has video, no sound not responding to remote control and front panel buttons responding when you push remote control and front panel button same time bad infrared sensor (killed by WINDEX using to clean the screen) changing IR sensor + restart factory sound settings in service menu solved the problem ----------------------------------------------------------------------------------- POLAROID 46" LCD TV REPAIR no power found blown capacitors in power supply + bad 3.3v voltage regulator on main board + 5v switching SMD MOSFET on main board after change - life is normal again . ---------------------------------------------------------------------------------------------------------------------------------- VIZIO P50HDTV10A REPAIR powers on ,has sound ,no picture on y sus board found dead yppd-016c integrated ic all fuses -ok changing IC solved the case ------------------------------------------------------------------------------------------------------------------------------------ SONY 46 " LCD 4100 MODEL REPAIR POWERS ON, NO SOUND ,NO VIDEO ,BACKLIGHT IS OK FOUND - WHEN YOU UNPLUG ONE OF RIBBON WIRES GOES TO LCD SCREEN FROM LCD CONTROL BOARD TV SHOWS THE PICTURE BUT HALF OF SCREEN WHEN YOU PLUG IT BACK PICTURE SHOTS DOWN COMPLETELY DEAD SCREEN (NOT WORTH TO FIX IT) LOW QUALITY SCREEN DESIGN OFTEN SCREEN PROBLEMS - THAT IS A SONY --------------------------------------------------------------------------------------------------------------------------------------- case today 10.24.2010 DELL W4201CHD REPAIR POWERS ON BUT NO PICTURE FOUND --- SHORTED TOP BUFFER BOARD, Y SUS BOARD NOT WORKING EITHER CHANGING TOP BUFFER BOARD + ONE MOSFET ON Y SUS BOARD SOLVED THE PROBLEM NO ACTIVE COOLING SYSTEM INSIDE (POOR DESIGN + NO COOLING SYSTEM THIS MODEL WILL WORK NO MORE THAN 5 YEARS ( Y SUS WILL AUTOMATICALY DIED IF THERE IS ANY PROBLEM WITH ONE OF THE BUFFER BOARDS - MY OWN OPINION ) ------------------------------------------------------------------------------------------------------------------------------------- VIZIO VP50 HDTV20A REPAIR TURNS ON, NO PICTURE , SHOTS DOWN IN 25 SEC FOUND --- 2 BUFFER BOARDS (TOP AND BOTTOM) SHORTED PAY ATTENTION ON BUFFER BOARDS ON THIS MODEL !!!!!!!!!!!!!! 80% OF PROBLEMS ON THIS MODEL --- BUFFER BOARDS ----------------------------------------------------------------------------------------------------------------------------------------- POLAROID FLM-3232 REPAIR TURNS ON, SCREEN BLACK , NO VIDEO FOUND - ON MAIN BOARD VOLTAGE 1.8 VOLT FOR MICROPROCESSOR IS 1.25 VOLT ONLY CHANGING + 1.8 VOLT REGULATOR ON MAIN BOARD (AS117) SOLVED THE PROBLEM ------------------------------------------------------------------------------------------------------------------------------------------ HITACHI 55HDT52 REPAIR TURNS ON , NO PICTURE FOUND - MISSING Vs AND Va from power supply changing 50n50 mosfet and 2.2 ohm resistor in power supply solved the problem --------------------------------------------------------------------------------------------------------------------------------------------- SHARP 26" LCD LC-26SB24U REPAIR SOMETIME WORKS ,SOMETIME NO POWER ,NO VIDEO FOUND - MISSING ALL VOLTAGES FROM POWER SUPPLY EXEPT STAND BY +5V BAD RELAY 5V IN POWER SUPPLY --------------------------------------------------------------------------------------------------------------------------------------------- LG PLASMA 50PC5D REPAIR TURN ON ,NO VIDEO ,NO SOUND , WILL NOT TURN OFF FOUND - MAIN BOARD NOT WORKING PROPERLY ( MISSING +3.3V voltage regulator FOR HDMI CONTROLLER) CHANGING HDMI MICROPROCESSOR / CONTROLLER ON MAIN BOARD SOLVED THE PROBLEM ---------------------------------------------------------------------------------------------------------------------------------------------- HITACHI P50T501 REPAIR TURN ON AND OFF IN 2 SEC. NO VIDEO /NO SOUND FOUND - BURN M807(LOCATION) IC ON ND60200-0047 NEW IC 3294F SOLVED THE PROBLEM ----------------------------------------------------------------------------------------------------------------------------------------------- PHILIPS 42PF7220A/37 REPAIR TURN ON ,AFTER 2 SEC -OFF ,NO VIDEO / NO SOUND FOUND --- Y SUS SHORTED (POWER SUPPLY GOES TO PROTECTION MODE) CHANGING C5041 ,D5022 ,Q5010 ON Y SUS + FOUR IC SN755867 ON LJ41-02760A SOLVED THE PROBLEM ------------------------------------------------------------------------------------------------------------------------------------------------ sanyo dp26648 26 " lcd tv no video , has background light remove all the parts and reattached cable between main board and lcd control board t-con - solved the problem -------------------------------------------------------------------------------------------------------------------------------------------- Magnavox 32mf231d REPAIR no video / no sound after testing -- found power supply not working transistor 10n80 in power supply shorted after replaced 10n80 mosfet - normal performance ------------------------------------------------------------------------------------------------------------------------------------------------- Toshiba 42hp66 REPAIR no video / has sound after testing - not working z sus board changing yppd-c018c ic and fuse 4a on it solved the problem ----------------------------------------------------------------------------------------------------------------------------------------------- Vizio vp422 hdtv10a after 5- 10 min no picture ,has sound,no menu,flashing lines only after checking - main board not working properly we install main board from vp423 hdtv10a -works perfect ---------------------------------------------------------------------------------------------------------------------------------------------- Vizio gv47l hdtv 10a REPAIR intermittent problem - sometime it is working good sometime- no video, no sound found - main board , u5 voltage regulator mps 1117 (1.8 volt) after changing u5 on main board - back to the life --------------------------------------------------------------------------------------------------------------------------------------------- Vizio lcd tv vx37l hdtv10a REPAIR turn on , no video ,vertical lines no sound , wan,t to turn off main board not working open fuse +12 volt line on main board , fmps1117 regulator on main board drop voltage to 2.1 volt instead 3.3 volt (input 5 volt) after changing fuse and regulator on main board - works perfect ---------------------------------------------------------------------------------------------------------------------------------------------- Vizio p42 hdtv10a REPAIR turn on ,has video .flashing dots all over the screen ( milky way) adjustment VSET on y sus - works but 50 % of dots still there other adjustments on y sus board -- no help at all. changed 053b y sus board -- same problem. changed logic control ----- bingo !!!!!!!!!!!!!!!!!!!! 077b logic control board (all smd capacitors on logic control board - high ESR. ) --------------------------------------------------------------------------------------------------------------------------------------------- TOSHIBA 42HP66 REPAIR turn on ,no video , some changing in size vertical colored lines , one of the driver IC on buffer board 117a extremely hot dead buffer 117a board changed 6871xxxx117a buffer board. tv back to the life ------------------------------------------------------------------------------------------------------------------------------------------------- PANASONIC TH-50PZ85U turn on , shots down in 3 sec , 10 times light on front panel bad power supply - FAMOUS ETX2MM704MG MISSING Vs and other voltages i am not going to show this time all problems this power supply has ,because there are people making money on fixing it. We respect that . But this time - we did extreme "facelifting" way , you can,t see it anywhere in internet. That is our way ,and we do not sell that . THIS INFO IS FREE .But you have to be a electronics repair handyman . We changed ETX2MM704MG on ETX2MM706NG power supply Yes , it is completely different board , but has exactly same connectors with no change ,and 706 is more powerful board with same output voltages ans sygnals.(no need to adjust ) and cheaper . ETX2MM704MG main power board and small stand by power supply were removed and 706ng (contains two board on aluminum chassis) installed. it is a little bigger in size , you have to modify couple holders to tight the board. We install one extra holder to tight power supply to aluminum casing of plasma panel . In our case it fits perfect. all wiring connectors are the same Some wires got to short to reach connectors , but we always can just increase them in length . Soldering skills required !!!!!!!!!!! After change - works perfect . no adjustment . We hope PANASONIC can and will install 706ng power supply on 50" plasmas instead 704mg . ready project picture http://i1177.photobucket.com/albums/x359/torba67/IMG_0539.jpg model th-50pz85u with installed 706ng power supply.. -------------------------------------------------------------------------------------------------------------------------------------------------- PANASONIC TH-42PZ77U REPAIR " face lifting " on famous power supply ETX2MM681MFsame story as above but this time we install TNPA3911 POWER SUPPLY insteadETX2MM681MFwires on connector p12 need to be increase in length ,rest of it the sameconnector p9 need modification screws holders need to be modified also same voltages ,same control signals if you do not have etx2mm681mf power supply you can do tnpa3911. ------------------------------------------------------------------------------------------------- PANASONIC TH-42PZ80U REPAIR NO POWER 10 BLINKS DEAD POWER SUPPLY LC0719-4001DC INSTEAD LC0719-4001DC WE INSTALL ETX2MM747AF POWER SUPPLY THIS PROJECT FOR EXPIRIENCE REPAIR TECHS ONLY P12 CONNECTOR COMPLETLY MODIFIED REST OF CONNECTORS ARE THE SAME + 15 V , +60V WE INJECT IN TO P12 CONNECTOR USING P35 CONNECTOR ON 747 BOARD NO ADJUSTMENT SAME VOLTAGE SAME CURRENT BOARD HOLDERS HAS BEEN MODIFIED ALSO ------------------------------------------------------------------------------------------------------------------- Panasonic TH-50PX600U REPAIRpanasonic power board ETXMM610MEFno power ,shots down in 2 seconds found missing Va voltage instead 610mef power supply we install TNPA3911 (SAME VOLTAGE ,SAME CONTROL SIGNALS, SAME CONNECTORS) NO ADJUSTMENT NEEDED. NEW BOARD NEED TO BE UPSIDE DOWN AND P12 CONNECTOR NEED EXTENTION 3-5 " ( TO SHORT) 2 BOARD HOLDERS NEED MODIFICATION. -------------------------------------------------------------------------------------------------- VIZIO VX37L HDTV10A REPAIR TV IS ON - BLUE SCREEN FOR 2 SECONDS AND SHOTS DOWN. FOUND--- ONE OF THE CCFL LAMPS INSIDE THE SCREEN BURNED. AFTER LAMP CHANGE - WORKS PERFECT TO KNOW WICH LAMP IS BAD YOU HAVE TO SHOT DOWN PROTECTION ON INVERTOR BOARD .(PIN 15 ON IC OZ9966SN - 10-20 K RESISTOR TO GROUND) TURN ON ,AND YOU WILL SEE BURNED OR BAD LAMP . ---------------------------------------------------------------------------------------------------------------------------------------------------- vizio VX42LHDTV10A REPAIR |
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vizio VX42LHDTV10A no video , no sound
found - missing 24 volt and 12 volt from power supply. original power supply DPS-283AP is dead.
DPS-283AP not available in shop , customer need it extremely fast . problem solved by installing DPS-319AP power supply from other model.
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VIZIO VX32L HDTV10A REPAIR
VIZIO VX32L HDTV10A PICTURE-OK SOUND -OK
REMOTE CONTROL DOESN,T WORK .
FOUND - SHORTED SMD CAPACITOR 1 MKF ON INFRARED SENSOR BOARD. SOLVED BY REMOVING CAPACITOR FROM THE BOARD. --------------------------------------------------------------------------------------------
HITACHI 55HDT52 REPAIR
Turn on and shots down in 5 seconds
found blown IC M801 on buffer board ND60200-0033
SOLVED by changing sn755866 IC on buffer board
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SAMSUNG HP-S4253 REPAIR
HORIZONTAL LINES ON PICTURE ,sometimes picture -ok
sometimes - no video
found blown capacitor c5065 on Y SUS board
changing capacitor solved the problem
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12.12.2011 VIZIO L32 HDTV10A REPAIR
No power
Power supply is dead DPS-199AP
Cristmas time - customer need it fast , no original power supply in shop
install FSP201-3M01 power supply solved the problem.
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SAMSUNG LN-R238WA REPAIR
Redish background light ,shadows on picture ,vertical lines
found oxidation on LVDS cable connectors (main board side)
cleaning connectors on t con and main board and LVDS cable solved the problem
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VIEWSONIC VX2835WM REPAIR
NO POWER, no blue light on front
original PSM217-404-H-R IS DEAD (HARD TO FIND)
Install DPS-210 POWER SUPPLY BRING UNIT BACK TO LIFE
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found - missing 24 volt and 12 volt from power supply. original power supply DPS-283AP is dead.
DPS-283AP not available in shop , customer need it extremely fast . problem solved by installing DPS-319AP power supply from other model.
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VIZIO VX32L HDTV10A REPAIR
VIZIO VX32L HDTV10A PICTURE-OK SOUND -OK
REMOTE CONTROL DOESN,T WORK .
FOUND - SHORTED SMD CAPACITOR 1 MKF ON INFRARED SENSOR BOARD. SOLVED BY REMOVING CAPACITOR FROM THE BOARD. --------------------------------------------------------------------------------------------
HITACHI 55HDT52 REPAIR
Turn on and shots down in 5 seconds
found blown IC M801 on buffer board ND60200-0033
SOLVED by changing sn755866 IC on buffer board
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SAMSUNG HP-S4253 REPAIR
HORIZONTAL LINES ON PICTURE ,sometimes picture -ok
sometimes - no video
found blown capacitor c5065 on Y SUS board
changing capacitor solved the problem
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12.12.2011 VIZIO L32 HDTV10A REPAIR
No power
Power supply is dead DPS-199AP
Cristmas time - customer need it fast , no original power supply in shop
install FSP201-3M01 power supply solved the problem.
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SAMSUNG LN-R238WA REPAIR
Redish background light ,shadows on picture ,vertical lines
found oxidation on LVDS cable connectors (main board side)
cleaning connectors on t con and main board and LVDS cable solved the problem
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VIEWSONIC VX2835WM REPAIR
NO POWER, no blue light on front
original PSM217-404-H-R IS DEAD (HARD TO FIND)
Install DPS-210 POWER SUPPLY BRING UNIT BACK TO LIFE
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PANASONIC TH-P50G25 REPAIR
POWERS ON FOR 3 SECOND AND SHOTS DOWN WITH 4 BLINKING LIGHT ON FRONT PANEL
FOUND MOSFET TRANSISTOR Q547 ON TNPA5081 SHORTED OUT
CHANGING TNPA5081 Y SUSTAIN BOARD SOLVED THE PROBLEM
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SHARP LC-32D43U REPAIR
NO POWER , NO SIGNS OF LIFE
FOUND - MISSING STAND BY +5 VOLT FROM POWER SUPPLY
CHANGING DPS-178AP POWER SUPPLY SOLVED THE PROBLEM
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LG 47LG70 REPAIR
POWERS ON ,NO VIDEO HAS SOUND
FOUND NOT WORKIING MASTER INVERTOR BOARD
CHANGING 2 CAPACITORS,ONE FUSE AND ONE MOSFET DRIVER TRANSISTOR ON MASTER INVERTOR BOARD SOLVED THE PROBLEM.
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SONY KDL-32L4000 REPAIR
NO LIGHT ON FRONT ,NO POWER, NO VIDEO ,NO SOUND
FOUND --- MISSING DATA FROM EEPROM ( NO INFO ON LINE I2C)
CHANGING MAIN BOARD SOLVED THE PROBLEM.
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PANASONIC TH-42PX75U REPAIR
SMALL 1X16" VERTICAL RED LINE ON THE PICTURE (LEFT PART)
FOUND --- BAD DRIVER IC QWE34524123 ON PLASMA PANEL
CHANGING PLASMA PANEL SOLVED THE PROBLEM .
PLASMA PANEL COST ----- $ 675 + SHIPPING.
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03.07.2012 SHARP LC-32AV22U REPAIR
FOUR TV,S AT THE SAME TIME IN OUR SHOP WITH SAME PROBLEMS---- GOOD SOUND ,NO IMAGE ONLY VERTICAL LINES ON SCREEN ,SOMETHIME AFTER 15 MINUTES WARM UP STARTS WORKING PERFECTLY FINE
FOUND---- ON ALL FOUR - BAD LCD PANELS (DEFECTIVE )
DRIVER IC,S ON TOP OF THE PANEL OVERHEATING AND CAUSE DAMAGE TO THE LCD PANEL
ALL TV,S JUST 3-4 YEARS OLD
SHARP LCD PANELS JUST NOT GOOD AS DESCRIBED.
LEFT NOT FIXED DUE TO HIGH LCD PANEL COST....
POWERS ON FOR 3 SECOND AND SHOTS DOWN WITH 4 BLINKING LIGHT ON FRONT PANEL
FOUND MOSFET TRANSISTOR Q547 ON TNPA5081 SHORTED OUT
CHANGING TNPA5081 Y SUSTAIN BOARD SOLVED THE PROBLEM
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SHARP LC-32D43U REPAIR
NO POWER , NO SIGNS OF LIFE
FOUND - MISSING STAND BY +5 VOLT FROM POWER SUPPLY
CHANGING DPS-178AP POWER SUPPLY SOLVED THE PROBLEM
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LG 47LG70 REPAIR
POWERS ON ,NO VIDEO HAS SOUND
FOUND NOT WORKIING MASTER INVERTOR BOARD
CHANGING 2 CAPACITORS,ONE FUSE AND ONE MOSFET DRIVER TRANSISTOR ON MASTER INVERTOR BOARD SOLVED THE PROBLEM.
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SONY KDL-32L4000 REPAIR
NO LIGHT ON FRONT ,NO POWER, NO VIDEO ,NO SOUND
FOUND --- MISSING DATA FROM EEPROM ( NO INFO ON LINE I2C)
CHANGING MAIN BOARD SOLVED THE PROBLEM.
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PANASONIC TH-42PX75U REPAIR
SMALL 1X16" VERTICAL RED LINE ON THE PICTURE (LEFT PART)
FOUND --- BAD DRIVER IC QWE34524123 ON PLASMA PANEL
CHANGING PLASMA PANEL SOLVED THE PROBLEM .
PLASMA PANEL COST ----- $ 675 + SHIPPING.
------------------------------------------------------------------------------------------------
03.07.2012 SHARP LC-32AV22U REPAIR
FOUR TV,S AT THE SAME TIME IN OUR SHOP WITH SAME PROBLEMS---- GOOD SOUND ,NO IMAGE ONLY VERTICAL LINES ON SCREEN ,SOMETHIME AFTER 15 MINUTES WARM UP STARTS WORKING PERFECTLY FINE
FOUND---- ON ALL FOUR - BAD LCD PANELS (DEFECTIVE )
DRIVER IC,S ON TOP OF THE PANEL OVERHEATING AND CAUSE DAMAGE TO THE LCD PANEL
ALL TV,S JUST 3-4 YEARS OLD
SHARP LCD PANELS JUST NOT GOOD AS DESCRIBED.
LEFT NOT FIXED DUE TO HIGH LCD PANEL COST....
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Repair Help
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|
Device
|
Problem
|
Issue
|
|
Computers
and Laptops |
No power, no charge to battery
| power supply, bad DC plug ,dead motherboard |
| No picture on the screen | invertor board, videocard ,bad flex cable (ribbon wire), blown capacitors on the mainboard,bad mainboard,bad videoprocessor on main board bad power supply | |
| Windows doesn't start | hard drive , bad ram memory, bad processor ,virus infection windows files corrupted | |
| stop working after 10 - 15 min | cleaning service , needs new heat sinking compound ,fan replacement, bad soldering joints on main board bad connections | |
|
CD and DVD Players
(Home, Car, Portable Any Design, Any Brand) | Frizzing picture, no video | video processor, voltage regulators |
| No power, no display | bad fuse, power supply not working properly | |
| ''No disc'' message, skipping, stops working after a while | bad laser pick-up assembly , needs cleaning service, bad spinning motor ,damaged plastic holders in mechanical unit ,laser pick up stuck in " end movie position" (way from spinning motor) 0 | |
| No sound | Sound output IC menu sound set up | |
|
LCD TV
| No power | bad fuse , power supply, main board |
| No channels, bad reception | tuner ,bad cable plug | |
| Vertical lines on the picture | I/O board, power supply, bad LCD screen | |
| Dark screen but has sound | inverter board , power supply, ,bad luminescent bulbs (one of them or all) main board | |
| blue screen only ,has sound | ,main video board only | |
| no sound | a/v control board ,sound output IC, damaged headphone plug. | |
| noisy sound high pitch sound | power supply | |
| turned off after 10- 15 min | power supply | |
| horizontal lines on screen vertical lines on the screen | bad screen main board or lcd control board | |
| slow motion picture on part of the screen | lcd screen | |
| turn on and then shuts down in 3-5 sec | ccfl lamps(back ground light) invertor board | |
| blue screen no sound | eeprom lost data main board | |
|
DLP TV
(LCD Projection) | No power | Fuse , power supply, function microprocessor main board |
| No picture, flashing red light on front panel | bad lamp , ballast board,COLOR WHEEL ,temperature overheating fuse, cooling fan, protection sensors ,open back cover | |
| Discoloration on the picture, color spot on image, colored dots on image ,missing one color | bad light engine only | |
| no color | bad color wheel | |
| humming sound but tv works fine | bad color wheel | |
|
Plasma TV
| No stand-by light, no power | fuses , power supply, not working cooling fan bad power cord |
| No picture but has sound | power supply, X or Y sustain board , bad screen (PDP panel), logic board ,buffer boards | |
| Vertical or horizontal lines on the picture | X or Y drivers, buffer board, bad PDP panel (screen) ,bad logic contol board | |
| Negative image | Y sustain board | |
| Stops working after a while | bad connections , power supply, internal components overheating, cooling fans, leaking capacitors, timer is on, | |
| Bright pixels on the screen | power supply (adjustment) ,y sustain board, poor connections in power supply | |
| dark pixels on image | Y sustain ,bad SMD capacitors, check power supply voltage | |
| dark lines verticaly comes and goes after while | PDP panel ,bad connections ,bad buffers boards | |
| hard to turn on | power supply | |
| turn off after 10-20 min | power supply | |
| PROJECTION TV | no power | fuse , power supply ,shorted circuit ,convertion circuit ,test the horizontal output circuit |
| no video has sound | power supply ,vertical ic , flyback transformer ,high voltage circuit shorted | |
| missing one of the colors | one of the picture tube ,video board ,crt board | |
| one horizontal line | bad vertical IC | |
| 3d image | bad convergence control board | |
| pop sound | high voltage circuit | |
| magic focus not working | convergence control board | |
|
Video Projectors
| Stops working after 5-10 minutes | cooling fan or needs cleaning service |
| No video, Dark circles on the picture | ballast board, bad lamp, bad light engine | |
|
Microwaves
| All problems | bad fuse, overheating sensors, magnetron ,high voltage diode ,door switches, bad protection pad inside in the microwave |
|
Camcorders
| All | mechanical part, bad fuses, DC plug, image sensor. Just too many to list. |
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