I recently got a 2008 Mac Pro from a friend as it was not working, and I’m trying to see if I can get it running again. Turing the machine on shows a solid light on the power button and causes the fans to spin at max, but it doesn't show a display or signs it had booted.
From what I have tested, the diagnostic LEDs show the CPUs, Standby Power and EFI working, but no GPU or Power Good. Looking it up, the next step appeared to be to check the board for any shorts or check the power supply. The motherboard appears to be good, so I purchased a used Power Supply, which did not solve the issue. I tested the voltages of the used Power Supply (except on the J1 Connector which connects to the power button) and they all appeared good.
(It came with the fans and ram, I just took them out to look at the full motherboard)
I have tried removing components resetting the SMC and PRAM, swapping power supplies, and checking the motherboard and power connectors, but nothing seems to help. What could be wrong or what other steps can I take to fix this Mac Pro?
Thanks for the help!
From what I have tested, the diagnostic LEDs show the CPUs, Standby Power and EFI working, but no GPU or Power Good. Looking it up, the next step appeared to be to check the board for any shorts or check the power supply. The motherboard appears to be good, so I purchased a used Power Supply, which did not solve the issue. I tested the voltages of the used Power Supply (except on the J1 Connector which connects to the power button) and they all appeared good.
(It came with the fans and ram, I just took them out to look at the full motherboard)
I have tried removing components resetting the SMC and PRAM, swapping power supplies, and checking the motherboard and power connectors, but nothing seems to help. What could be wrong or what other steps can I take to fix this Mac Pro?
Thanks for the help!