Power failure to logic board
Hi, i recently bought a second hand MacBook Pro a1260 and i used it for only a few hours before it started failing to boot. Black screen fans and disk spinning but nothing else. I took out the logic board and the CPUs were not clean or pasted properly so i cleaned them up and put new thermal paste on and i got several more hours of boot time. Today it died again and I have isolated the problem to a bad connection on the ic chip to the right of the memory (f2116bg20v h8s) it looks like this processor has a weak connection if i lift the rhs of the chip the system boots fine. Is there anyway i can fix this or does this mean a new logic board? Last digits of serial number are z3ja
Sounds like you have a cold solder joint on the South Bridge interface chip.
Do you or a friend have the needed equipment to handle SMT components? If you do you could try re-floating it. This is a very advanced project and may fail.
Otherwise, sorry to say I would try to get your money back, or look into getting a new logic board.
Apple no longer services this model, but some authorized service centers still do (and may even have the needed parts in hand).