Rev b 20" - In for treatment - cpu fan +

Question

Hi,
I'll try and keep this up to date for you in case you have similar.
Took iMac 20" rev b into Apple Store Birmingham this afternoon for them to investigate and resolve:
Whirring cpu fan
Slight buzzing on power supply
Bubblng on har drive coating (the black body coating)
5 mths old, whirring has always been there but the irritation it causes has become too much, for a premium product I do not expect this cranking up sound, makes it feel cheap, which it certainly was not.
I have been through online chat/ordered ne upper fans/ to no avail.
Bit concerned at the moment as the genius told me a new logic board will sort. I told him I found it hard to believe that a new logic board would resolve fan vibration, he then asked if he should have the fan replaced (like I'd know, he's the genius!!)
Apparently should have it back soon so will have to live with new iBook until then (looks a bit silly with Elgato eyeTV on it though as I have replaced the main TV with this now)

Answer 1

Edward,
Perhaps one of your fingers slips off the keys.
When doing a PRAM reset, the process isn't over until one breaks the cycle, so yes, my screen shows nothing while I'm holding. I may be mistaken, but I'm not aware that a long PRAM reset risks any damage. I've held the keys down for as long as a dozen chords [never needed to on the iMac, but other Macs], when I've been frustrated enough {:-) They always seem to be timed at equal intervals. By the way, it seems to me that after the first chord, the following chords are heard at a lower volume, but I don't know why. [generally, I have my sound level maxed]