Power Mac G5-Bad dimms/bad logic board?

I recently have tried to install 1 gig of RAM into my power mac G5. It only has 2 dimm slots available, the other two hold the 256 mg of RAM that came with the computer. When I install the new RAM (purchased through apple) the computer gives me a grey screen with a whole lot of writting that I can not get past.
I ran a hardware test with just the original RAM in and everything passed.
I tried to run a hardware test with the new/original RAM and was not able to.
When I take out the new RAM, the computer runs fine.
I then switched the new RAM with the original, leaving 2 slots empty and the computer started up fine. I tried placeing the original RAM in the 2 slots, filling all 4, and this time a black screen came up repeatedly.
Should I just max out the only 2 DIMM slots that work? Is it the 2 DIMM slots that are failing? I am sure it is not the RAM after many conversations with apple, but am worried it is my logic board..and I just stepped out of my one year warenty..(siiiiiiigh)
Any advice would be great.

What are the specs of the new ram vs. the old ram? It sounds like you may have mis-matched ram modules that won't co-exist with each other. Where did you get the new ram?

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  • G5 Logic Boards

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