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Help! Calling all laptop hardware gurus! (Dell CPi-A video prob)

AnyMal

AnyMal

Lifer
OK, so I have this Dell laptop that is giving me a headache. I bought it knowing that display was bad with the intention of rebuilding it.

Here's what puzzles me: the laptop will power on and boot (to external monitor) as song as LCD is physically disconnected, i.e. i disconnect video ribbon cable from motherboard. If i plug video cable back into motherboard that laptop WILL NOT power on.

I am running out of ideas.. Do you have any?

Any help will be greatly appreciated.
 
Can you explain this in a little more detail? What I am getting is that it does boot fine with the LCD connected and having an external monitor connected , and it won't even boot up if you disconnect the ribbon off of the LCD? If this is correct that's the way most laptop's are designed. I don't know any way around this either but I have seen it with a bunch of laptops.
 
No it will not boot with LCD connected, it will boot ONLY if I disconnect LCD cable from the motherboard.
 
i'm dell certified to work on those laptops, and the only time i've seen that happen is when the cable itself was bad. I have no idea how much they cost, or if you can even buy just the cable (not sure if it has its own part number), but it's a simple replacement...
 
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