A freind brought me her notebook after returning from a trip abroad. It was working fine on her trip but upon her return the display screen is all white when powered on. Every pixel is lit white! I sometimes wonder whether airport security scans can damage lappy's?
I'm trying to diagnose whether something is wrong with the screen or is wrong with the video signal going to the display, IE whether it is an LCD issue or a mobo issue since the video is integrated on the mobo.
It is not a brightness/contrast issue. And the video will display on an external monitor connection via the svga port. Sometimes when cycling between the external monitor and the LCD display I can see some momentary imaging on the LCD which almost instantaneously dissapates to the all white phase.
If I try switching video modes w/o an external monitor, the LCD phases to all black and again black, and back to all white. Thinking that an all white screen would indicate that every single color pixel group is being powered, makes me think that the display is OK but that something is generating an all white image.
btw, what is an LCD screen inverter and what is its function? This seems to be a small IC board situated between the mobo video system and the LCD display. Could this component be failing to function? Would it cause this type of issue?
Any info would be helpful, even if only rule out an inverter problem (probably the cheapest repair).
Thanks for any input,