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andy

andy

Member Since 13 Jul 2005
Offline Last Active Jul 10 2013 09:05 PM
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Posts I've Made

In Topic: Need help with MDD Powermac Upgrade

23 February 2011 - 08:14 PM

You need to buy a CPU with the correct bus speed. 166MHz is more common, but check your system profiler before you buy.

In Topic: G4 mirror door 1.25 Ghz

23 February 2011 - 08:12 PM

Those are classic symptoms of a failing power supply. It's full of failing capacitors which work better when they're warm. The good news is that it's not too hard to replace the power supply. There's a good supply of refurbished power supplies on ebay, but they're not cheap. I would avoid a "used, but tested good" power supply since it's a ticking time bomb unless it's had the old capacitors replaced.

In Topic: Mac Pro 2006 CPU B fail

29 December 2010 - 10:23 PM

As a last ditch effort, I tried pulling the firmware chip and reprogramming it in an EPROM programmer using the file from the emergency firmware recovery CD. The contents of the firmware chip closely matched what was in the file although the file had a few small things missing (like the serial number, as you would expect). The computer's behavior is exactly the same, so I have to assume it's not caused by corrupted firmware. It was a long shot anyway.

One piece of information to add is that if I only have CPU A installed, I get the CPUA FAIL light. If both CPUs, or only CPU B is installed, CPUB FAIL lights up.

Apart from some damage to the case, it looks like new. The fans and heat sinks are spotless, so I'm guessing it was the victim of an unfortunate accident when it was new(zapped by static, power surge, someone dropped a screw in while it was running,...). Without knowing something about what was done to it, I don't know where else to look, so I guess it's a parts machine unless I find a cheap logic board.
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