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TICKET ARCHIVE -> PM Dual G5 2.0 (2006) Major failure

nt40lanman - Aug 26, 2008 - 11:32 am

I have a Dual 2.0G G5 Power Mac here. When you plug the power into the machine, it automatically powers up. The fans come on low and the power light is on. There is no hard disk sound or video. There is no chime or sign of any intelligence. The LED #7 (Checkstop) is on and solid red. I have reseated the video card, and taken out both pairs of memory dimms, rotating the pairs in various slots to eliminate a single dimm or slot. I pressed the SMU reset. I suspect the system board or the power supply. Would you have a guess on what could cause this and how to test it? Also, how to get the heatsinks out so I can reseat the processors?


Second question if you have the time, I have an early dual G5 1.8 PM with an AGP Geforce 5200 video card. It was dead so I reseated the video card and it booted. When it went dead again, reseating usually did the trick. Now it's beyond that. It will boot if I take the video card out. I can hear the hard drive booting the machine. Pretty sure it's just a bad video card but do you have an opinion?

Thanks very much for your help and take your time. They aren't going anywhere.

gsahli - Aug 26, 2008 - 2:08 pm

I'd restart and reset the parameter ram - immediately after start/restart, hold down command-option-p-r, until you hear a repeat of the start gong. Then release. If it starts up then, you can guess that the backup battery is dead. Parameter Ram/backup battery remembers video resolution, startup drive and some others, so it could explain what you see so far.

Don't mess with the processor yet.
Start up with the hardware test CD and see if motherboard, ram, drive and power supply pass.