HP-Pavilion 5000

[momaka]

Re: HP-Pavilion 5000

Has anyone been able to reball one of these chips by hand?? Or will I be the first to try

I've heard that it has been done before, but it's extremely time-consuming.
First you have to remove the GPU from the motherboard and remove all solder from all of the contacts on both the GPU and motherboard. Then you flux each contact on the GPU and you add new solder (that's the time-consuming part). Finally, place the GPU back on the board again with flux over the solder, then reheat again so that the new solder bonds to the board.

Sounds like something you want to try?

How many times can one heat these boards

Depends on how much you heat it and how hot your heat gun is. I don't think there's a definite answer to this, though.
If you have the time, you can try it until something breaks or melts beyond repair. It's already broken anyways, so that probably doesn't matter.

[rigeback]

Re: HP-Pavilion 5000

I might give it a go when there nothing to do, how do you remove the resin on the 4 corners which have has to be removed first I imagine for removal of the chip, and would it be possible to make a dry run test of this chip prior to re soldering?

[momaka]

Re: HP-Pavilion 5000

how do you remove the resin on the 4 corners which have has to be removed first I imagine for removal of the chip

Not sure. This is the first time I see this stuff. Perhaps acetone? Is it soft or hard?

would it be possible to make a dry run test of this chip prior to re soldering?

I don't think so.

[rigeback]

Re: HP-Pavilion 5000

Very hard, I'm going to try another reflow with the heat gun before I try removing this chip