my IBM thinkpad t42pnk will not charge or power on

[rkawakami]

It's possible that the same problem that I've found on T23 motherboards which cause power problems has also affected your system.  That would be a loose or partially disconnected inductor.  They generally look like these:

http://www.kawakami-ca.com/ibm_t2x/t23_inductors.jpg

Inductors can also "sing" (emit a high frequency whistle) so that might be another clue.

However, even if you locate a loose inductor, your reflow of the motherboard could have caused more problems.  You could ask your school for any compatible T42 system which has a busted LCD and hope that the motherboard doesn't have any problems.

[LenovoIBMuser]

when i took it up to the tech place they said that i had reflowed it correctly, i just got new solder, i am going to see what i can do to fix it,  i called the school, they have quite a few ones with a busted screen, and a couple without a screen unit at all  so its worth a try to fix the old mobo because it has the ati readeon firegl graphics chip with 128mb compared to the other t42 s that have the radeon with the 64mb or video ram

[lead_org Microsoft MVP Contributor]

the problem is half solved, now you just need to pull those laptop apart and get the motherboard that you need.