My internal hard drive is making "clicking" noises

Hi there,
I have not been around for a while and I see that everything has changed... anyway... for a while now my harddrive is making noises as if it was being accessed all the time. There is plenty of RAM available, but still...
Latterly I have been having problems with Firefox as it is sucking all my memory, but I believe my issue with the harddrive making noises is quite separate.
Not quite sure what other info might be usefuk... except from FF, I don't have any process taking up too much memory. The only thing is kernel_task that now is at 335MB (I don't remember it too be so high).
TIA

Again, make sure you have everything fully backed up. The AHT isn't considered all that reliable. If you get an error, it can be trusted. But no errors, not necessarily. Did you run it in Extended?
Smart Utility, linked above, may prove to be a more thorough check, and you won't be wasting time testing the memory. I would run that.
Also, open Activity Monitor in Utilities. Switch to System Memory. Down at the bottom what does it say for Page outs and Swap used?
It's also possible the noise is coming from a fan. Get iStat Pro to check the fan speeds and that they are running normally.
http://www.islayer.com/apps/istatpro/
Can you locate what part of the computer the noise is coming from?
Message was edited by: WZZZ

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    I powered down, removed the Ribbon and Power cables from the original "Master" drive, reinstalled the Jumper on the New Drive as "Master", plugged the End of the Ribbon and the Power cables into the New "Master" drive and powered up. The screen went to the "?" within 20 seconds instead of 4+ minutes, and no more "buzzing".
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