I wonder if any of you can give me some advice?
I have a ThinkPad T43 that has a well known and dreaded Southbridge chip problem. Basically the previous owner (my dads old laptop, im trying to revive) held it by the corner of the laptop and introduced some serious flex and the stress has broken the solder on the Southbridge chip.
Basically everything freezes and doesnt come back to life unless you apply pressure to the mouspad area. I have tested this diagnosis by taking it apart and waiting untill it freezes - then applying pressure directly onto this chip ... lo and behold everything immediately comes back to life.
SO .... My question, Does anyone know anywhere that can reliably reball / re-solder this chip back into place. I have a couple of quotes from places in Belfast but they are all £90+ and I just can stretch to that right now. So any amature Techys get in touch, or if you have any other suggestions, please let me know.
If it looks like [url=http://www.thinkwiki.org/wiki/File:T43-2668-open-GPU.jpg]this[/url] and you're getting a guarantee with those quotes, Â£90 is a complete bargain. This chip has 609 pins... Six-hundred and nine. There's a reason these come pre-soldered to motherboards. The only realistic option to fix this is [url=http://en.wikipedia.org/wiki/Reflow_soldering]reflow soldering[/url] - not an amateur exercise. If you want to do something yourself you *might* be able to get a bargain motherboard on ebay and swap it out. Again, not the simplest of jobs given the T43 form factor but one you can do yourself (with some care).
Olan, great response, thanks for that. I have been slightly tempted to try the resolder myself as I work in I.T.
Do you know if there is a doc / intsruction manual on how to do the reflow?
I will probably end up getting it done profesisonally but i'd like to make sure that I need to first. Also this isnt my main laptop, its an old-ish laptop that im basically trying to revive, so i can afford to have a blast and mess up without worrying too much.
I tried [url=http://geektechnique.org/projectlab/726/diy-obsolete-ibook-logic-%20board-repair]this[/url] on a friends iBook and it worked. It's probably the most ridiculous and unsafe way of doing it but it worked for me. There is a fair chance you could completely fry the chip.
I love that.
Haha, I cant work out if thats stupidity or pure genius. Suffice to say thats not how im going to handle it.