Two months in the past I used to be given away a Mac Professional 1,1 (A1186), in excellent working situation. Some days later, I had the intense thought of testing a working PCI specific video card I faraway from a PC on my Mac, however it didn’t activate.
So I eliminated the video card, reinstalled the outdated one, and once more, it didn’t activate. I eliminated the 3V battery to reset the PRAM, changed it with a brand new one, carried out a SMC reset, and tried every little thing I learn on the boards, with no luck. I checked the logic board standing LED’s and I seen all of them remained off.
Suspecting the wrongdoer was the PSU, I ordered a second-hand PSU on eBay (Delta DPS-980AB A), I put in it yesterday however my Mac nonetheless doesn’t activate. No standing lights, no clicking sound, no spinning followers. I checked all of the connectors once more. I examined it by unplugging connector # 4 and shorting ‘PS_ON’ plug and floor along with a paper clip. The PSU switches on, all of the followers begin spinning, all of the led’s on the RAM raiser mild up, however the logic board LED’s don’t mild up, the switch-on button doesn’t reply and as quickly as I take away the paper clip, the PSU switches off.
Conclusion: the “new” PSU works positive, so does the outdated PSU (I examined the voltages on each of them), and my logic board is toasted, I’m afraid.
Is there any “miraculous” process to revive my Mac, or do I’ve to purchase a second-hand logic board?
