So, I backed up the G5 Quad, restored it onto my similar vintage G5 Dual and put that machine back on line (the G5 serves as the Happy Macs Lab online Gopher server, and so it plays an important role, requiring a stable and reliable machine). It did not look like a trivial undertaking and I did not have the time just then to do anything more complex.
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I downloaded the G5 Quad service manual from the web and reviewed what needed to be done. The machine wasn’t dead anymore, but it was far from healthy. This was both too hot and too noisy to allow me to return the G5 to full service.Ĭlearly I needed to get into the CPU area and get at a presumed accumulation of dust there before I could restore fully normal operation. It improved, but the CPU temperature stabilized in the low 60’s C region, and the fan rotations at their full value of 3600 RPM. This aligned perfectly with the blistering CPU temperatures and the full speed fan rotations and so I carefully cleared all the dust out and closed the machine back up, confident that it would now be back in the land of the living. Instead, what I found was dust, and lots of it, obstructing free airflow into the CPU area of the machine. In The Reports of My Demise Are Greatly Exaggerated, urged on by reader Ty (author of the now defunct Resto-Bytes blog) to not give up without a fight, I made an initial effort to find and repair the cause of the problem, which at the time I assumed to be a failure of the G5 Quad’s infamous Liquid Cooling System (LCS).
I shut it down immediately, assumed rather too quickly that it was done for and deduced that there was no course left but to harvest all the valuable parts I could from it and put the carcass out to pasture. In A Casualty on the Front Lines I described discovering the machine one day with its fans running at full blast, and the CPU temperature meter hovering in the 80’s C. Some time back, I did two posts on the apparent death, and then partial recovery, of my much loved Power Mac G5 Quad.
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