Depends on your mechanical interest and ability.

Sure you can dismantle the PSU and change out the fan if you are into the basic mechanics of screws etc.

You could also try a very precise aim of WD 40 or a Teflon lubricant.

As to replacement at least go to a 400 > 500 watt PSU. That is standard for todays machines.

If your case format is ATX which it looks like then all you need to specify is an ATX PSU.

If you happen to have a spare PSU then go ahead and change it out.

Hi Jeph,
wasn't ignoring you, but I edited my last post on page 1,
hoping it would end up on this page but not so - if that makes any sense!

anyway, upon more curious research found this fab little site:
http://www.dansdata.com/fanmaint.htm *wd 40?*
hmm, that'll be easier than changing the PSU, so,
did them all:

PSU fan


CPU fan


Case fan + good clean


Lot better than the pics on page 1

Fired her up this morning and touch wood, it's like a rolls royce!
Can't work the oil in that fast surely? oh well, I'll give it a week and if still quiet will
post back to confirm and hopefully conclude this little journey

nearly 2 weeks an all quiet so must be fixed

Thanks for the update!

Glad (not) to hear it!

Let us know if we can help further.