Here's another video of a LCD TV repair made on a Magnavox 15MF170V/17
which is a small 15-inch flat panel TV. The malfunction is
characterized by a blank white screen when you power up the unit. There
is audio coming out but the screen is just white and not displaying any
pictures.
The repair video showed that this problem is being
caused by the absence of electrical input which is needed to power the
electronics of the LCD screen such that all you are seeing is the LCD
backlight which is white.
The problem was traced back to a faulty MOSFET
(metal-oxide-semiconductor field-effect transistor) which is a very
small 8-pin chip that acts like a switch that allows electricity to be
fed to the LCD electronics.
The fix involved replacing the MOSFET
but it does not show the actual process of removing and then replacing
it with a new one so this is not beginners stuff. The transistor is very
small and the video even said that it is a bit tricky to work on
without the appropriate tools.
Important thing is to determine
first whether you are having the same problem by checking if the LCD is
really not getting any power using a digital multimeter on the connector pins that was pointed out in the video.
If
you need the schematics for this product, you may check out another
post of mine that discusses where you can possibly find LCD repair
manuals and other relevant data sheets for the needed parts.
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