I see a lot of laptops fail because of the "Video Card", which in
reality is a large IC mounted om the motherboard in most cases. the
problem is that the IC is connected by many small "dots" on the bottom
surface that must line up exactly with the dots on the motherboard, and
during the soldering stage must all flow and make a good contact. My
understanding is that about 25 % of the boards fail the initial
manufacturing process because of issues like this. Then, after the
boards are put into use, the video IC is probably the second hardest
working IC, after the main CPU, and most laptops have a very
rudimentary colling fan, or none at all, take the heat away from the
IC. So it gets too hot, warps a little, and one of more of the little
dots become disconnected. When this happens, the video may become
intermittent, or maybe the unit will not boot at all. I think this also
accounts for a lot of laptops that fail intermittently.
I have had some success by simply heating the video IC with a good heat
gun to at least 185 degrees C, maybe a little more, so the solder will
re flow. But it is not a reliable process. I also bought one of those
"rework" platforms that can preheat a small section of a motherboard,
then heat a small IC area with IR pulsing, but it is no better. I
usually just buy a replacement motherboard for the repair job any more.
Computer Monitor Service Inc.
Ardell's Laptop and PC Repair
10816 E. Mission Ave.,
Spokane Valley, Wa. 99206
Stanley P. Pickens wrote:
> Thanks Ardell.
> Will be going with the new part out of China.
> I'm curious to know if anyone has run into a mobo/video card problem in
> a laptop that is affected by the manufacturing/design troubles nvidia
> had in late 07 and 08.
> I've a laptop that didn't make the extended warranty/free repair list
> even though it had its motherboard replaced within original warranty
> period and has never been able to complete a restore from manufacturer's
> from dvds because of a video error. I've been able to abort the dvd
> install just after vista gets loaded and install drivers and softwares
> individually but within a few days something makes the pc crash to the
> point it must be reloaded again. Any suggestions?