I bought an as-is original 2006 Mac Pro that I'm trying to get working. Unfortunately, I know nothing about its history. As found it was complete except for the RAM, video card, hard drive, and side cover. I bought a pair of 1GB Samsung 667MHz FB DDR2 DIMMs, and flashed a Radion HD3870 with Mac firmware.
It turns on, but there is no turn on chime, and the sleep LED remains on, then after about 5 seconds, the CPU B fail LED turns on. I have tired swapping the CPUs, and running it with only one CPU in both the A and B sockets with no change. The sleep LED blinks if I turn it on with no RAM, so at least it can detect a RAM error. It doesn't appear to detect the keyboard and mouse, so I can't reset the pram, but I did remove the battery. I also tried it without the video card in case my flashed 3870 is causing problems, but there's still no chime. I even tried the firmware recovery procedure, but the sleep light just blinks rapidly when I hold the power button and it never opens the DVD dive.
Everything is pointing to a bad logic board, but before I call it dead, is there anything else I'm missing? Does the Mac pro logic board have any known weaknesses or common failures?
andyMember Since 13 Jul 2005
Offline Last Active Jul 10 2013 09:05 PM
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