I had the fans and HDD replaced in my 1.67Ghz PB G4 in January, but I think the fan noise is getting too loud again, plus the HDD randomly squeaks and squeals. The problem with the random squealing is that I can never start the camera on my phone quick enough to record it, and it is COMPLETELY random! Does anyone know what the normal operating noise is for my laptop, or where I can find this out from? The normal fan noise is OK, but when the processor is under full load and the fans kick in to full speed, it sounds like the vacuum cleaner is on in the room. Should I take it back to the shop? It was 'repaired' roughly 2months ago. HELP!