Hello! I recently inherited an HP Pavillion N3350 from my brother that has a problem with the LCD. The screen is all white all the time and doesn't display anything at all. I plugged a monitor into the port in the back and it worked fine. I've checked for loose connections on the MB, and both of the connections on the inverter board without results. It isn't a harsh white screen with the heat I've read about; it is more of a soft, unhelpful, white screen. Any idea as to if it would be an easy/cheap fix?
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Have you dismantled this recently? If so, check that the video cable from the screen to the motherboard is firmly in its socket.
If you have not, then try to connect it to an external monitor and see if the problem goes away, that will eliminate the graphics chip if it does. You then need to look at the screen itself, checking all connections are tight. Normally with a white screen, the backlight is working and I would think the inverter is too (although not definate), and it would apppear to be the connection between the mobo and screen.
If it still persists, there is a much deeper issue with the motherboard
It is highly improbable that heat from the CPU can crack a LCD screen. Even if the fan was faulty the CPU would have shutdown (thermal overload) before it would affect the LCD screen.
If you apply pressure to the face of the LCD screen or twist the screen or impact the screen with a hard object, any of these will cause the LCD screen to crack.
webcam has small CCD in it and if it goes bad it will show you blue or white image sometime and then other times it will work fine is it is showing you blue or white images sometimes you can take LCD bezel of and then replace webcam easily it is just a small board with CCD inbuilt.