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.
As always, handling electronics is an activity not to be taken lightly. Be sure to take all the necessary precautions. If you are a beginner, it is recommended that you take an LCD Repair Course first.
Head on over to the video’s Youtube page to get more information about this LCD repair project.