Question about KDS Valiant 671DP Notebook
It sounds like the screen inverter is going out. The inverter works in this way: The power supply cuts the amount of power going into the board down, however the screen needs more power to enable it to function properly, so the inverter boosts the power back up to a level that the screen needs. If the inverter starts to go out it can create a multiple amount of indications that are noticable on the screen, one of them is darkening of the screen. It could also be the screen itself, but I'm leaning towards the inverter.
Posted on Jun 18, 2008
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Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your video card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.
If you see no icons by shinning a flash light and the external monitor works, then your screen is bad. If you see no icons by shinning the flash light and nothing shows on the external monitor, then most likely your video card is bad.
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