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HP Pavilion N3250: No video after DC jack repair

I have a hand-me-down HP Pavilion N3250 Laptop running Windows ME. It was performing fine until I started having problems with the DC jack where the AC power adapter attaches stopped functionally properly. After researching th problem, I found that it was apparently a common one in which overheating causes one of the solders to the jack, usually the positive side, breaks or unwelds from the heat causing intermittent power. Being fairly savvy with desktops and not having the money for a professional repair, I undertook the project, using a photo website to help find all the screws and the proper order of removal. To make a long story short, I disassembled, resoldered successfully, and meticulously reassembled everything (no leftover screws!). The power connection nows works great, but I have no video display! The lights all come on in proper boot-up sequence, but the screen shows nothing. Can anyone tell me what to look for as far as what connections might be at fault when trying to troubleshoot? The large card that contains the external VGA connection, serial port, and printer port appears to be properly seated. By the way, the external VGA connection does not work either. Attaching to a separate monitor produces no display as well. So, could this video/sound/serial/printer port card be at fault? Any and all input accepted gratefully. Please don't flame me too bad, as my usual patients are dogs and cats. Thanks.
Bill Snyder, DVM

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Re: HP Pavilion N3250: No video after DC jack repair

Its sounds like some damage was done during the dismantle/reassembly and now the onboard graphics has dies like you said. Could have been cause by static perhaps. Easy to damage them as i have found out myself so dont feel too bad.

Posted on Jan 06, 2008

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ATI Mobility Radeon X600 (PCI Express?), in an HP Pavilion zd8000 Notebook.

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