Toshiba Satellite L750 Notebook Logo
adele Posted on Jun 08, 2012
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L750 block of colour on bottom half

Block of colour across screen

1 Answer

General Systems Consulting

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  • Master 5,051 Answers
  • Posted on Jun 08, 2012
General Systems Consulting
Master
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Your lcd screen is going bad. It's either the lcd screen or the video card inside the computer. To isolate the problem try connecting another monitor to the computer. Borrow a monitor from a neighbor, friend, relative or co-worker and connect it to the computer. If the Borrowed monitor displays ok then your video card is ok, but your original monitor is bad. If the Borrowed monitor displays the same as your original monitor then your video card is bad.

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 the video shows on the external monitor that proves your video card is ok, ,but your lcd screen is bad. 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.

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