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Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.
Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout 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 correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally 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 lightand nothing shows on the external monitor, then most likely your video card isbad.
Just a guess, the light starter choke circuit board is probally shot. Its located below the screen just behind the surround bezel. The screws to take it apart are behind the rubber dimples. New circuit boards are available on e-bay. Noticed that these circuit boards are being sold to solve the problem.
it surely is a keys combination. just find the little icon that represents wireless over the f1, f2, f3.... keys... arround those keys and by pressing and holding Fn key and at the same time that wireless key you will enable/disable the adapter...
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