In article , Andrew Gabriel
wrote:
In article , Bod
writes:
On 12/02/2015 10:07, Martin Brown wrote:
On 12/02/2015 09:37, fred wrote:

Any cures for a noisy CPU fan, apart from a replacement ?

If a quick clean a drop of WD40 doesn't fix it then replace ASAP.

Bearings are probably about to fail and a CPU with a stalled fan
doesn't last very long before it overheats. The chip dissipation has a
power density that is roughly the same as the tip of a soldering iron.

BTW, WD40 is a solvent, *not* a really lubricant. It'll wash away
lubricants.

I use WD40 to wash out the dried lubricant and clean up the bearing,
before re-oiling it (with oil, not WD40).

Note that this is a short term fix only. This happens when the original
oil which is soaked in to the phosphor bronze bearing has dried up, and
you can't get new oil into it - the pores are all blocked with dried
gunk, so you're limited by the small amount of oil you can get to coat
the surface.

If the bearing has run dry long enough to wear the hole, it's not going
to be even temporarily repairable.

A colleague used to repair fans on Tektronics 'scopes by soaking the
bearing in 3-in-one oil over a weekend. It gave it time for the oil to get
properly absorbed.

--
From KT24 in Surrey

Using a RISC OS computer running v5.18