No idea. Mounted the small rubber shroud for the rear fan from the Quicksilver, as opposed to the plastic shield that holds the fan in the Digital Audio, and I've mounted a 120mm fan on top pointing out, Intel cooler style. I don't honestly think heat is the issue, but I'd like to at least eliminate it as a variable (or hey, maybe it is the issue, and I can prevent losing another night to fighting with yet another cursed G4).
Starting to once again lose my taste for playing with old Macs (though there's always the possibility that it's a side effect of the modified ATX power supply).

