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Mac Pro (Early 2008) Not Starting Up.

I had to work on my dads Mac Pro today as it wouldn't turn on, he was panicking a bit as he had work which he had to do on it (he is a typesetter and printer).

Symptoms were a rapid flashing power LED (approx 1 pulse per second), no startup chime, no screen coming on.

I diagnosed it down to a bad DIMM module, after a lot of swapping modules I was able to determine which one it was.

The modules are installed in pairs, so it had to lose 4GB of ram as they are 2GB modules, fortunately it had 12GB installed (4x1GB and 4x2GB) and he doesn't use it for anything that requires all of the ram anyway, so 8GB will be OK for the time being until I get OWC to send a replacement.

I purchased the modules as a set of 4 in 2013 from OWC, and they have a "lifetime warranty", we shall see if they follow through with it !


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