iMac sudendly doesn't start after GPU fix (reflow)
Hi everyone,
I repaired the iMac GPU card by doing a reflow in the oven (typical procedure for fixing that batch of GPUs): Mid 2011 27” iMac, AMD Radeon HD 6970M 1GB GPU.
Reassembled everything and the problem seemed to be solved. Suddenly, after about a week of proper operation, the computer shut down and now there is no sign of life (pressing longer the power button , I changed the power cable, changed the wall socket, tried to remove RAM. Nothing)
I mention this detail: I did not do the reflow myself and the person who did removed the GPU from the oven too quickly at which time two diodes were unsoldered. Then I re-soldered by reflowing again with solder paste.
What could have happened? Could it be just the GPU shorting and not starting the iMac or something else?
Anyone have any ideas?
Thanks in advance
Bu iyi bir soru mu?