If you have an ohm meter you can check the pins of the extension cable from end to end. Check for any pins with unusually high restiances. You can also check for shorts from pin to pin. Radio Shack has ohm meters for $30 and they have a 30day return policy. I have had extension cables give horizontal lines that slowly foat down the screen and other wierd noise problems, but they have never kept my screen from working. Opens or shorts are the only things that could make a vga extension cable not work.
mike
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91 cadillac sedan deville, winXP, FV25 with Celeron 800, Redant 7" widescreen in dash, Opus DC-DC, Irman, Digital Cable remote(lots of buttons), 120 gig 7200rpm 8meg cache WD hard drive, VI power mobile HD rack, mediaengine
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Can't get VGA extension cable to work...
Linear Mode
