[bcab] Re: possible fan problem

Hi Alan,

I think you may have got to the bottom of this already, but just in case it
helps, I had a similar problem a few months back.

The computer powered up, but then cut out and after a couple of tries, it
wouldn't even power up.  I took it to my local shop who built it for me,
thinking it was a power supply problem.  Actually it was a small fan which
had stopped working and the reason the machine cut out and then wouldn't
power up was that it has a safety mechanism, whereby it cuts out if it gets
too hot.  This saves further damage being caused.

I must say this was a piece of protection I wasn't previously aware of, but
thought it a very smart idea.

It cost me about £30 to get put right.

Hope yours is no more serious.

Richard

Richard West - +44(0)1603 423144
                      - rwest@xxxxxxxxxxxx
----- Original Message -----
From: alan rayner <amrayner@xxxxxxxxxxxxxxxx>
To: <bcab@xxxxxxxxxxxxx>
Sent: Sunday, January 28, 2007 5:24 AM
Subject: [bcab] Re: possible fan problem


> Hello Steve
> Until I get someone to confirm it, I think it is the power suply unit
where
> the fault lies, since I had a cursory feel inside and the power supply fan
> turns without any friction.
> cheers
> Alan
> ----- Original Message -----
> From: "Steve Crawford" <steve@xxxxxxxxxxxx>
> To: <bcab@xxxxxxxxxxxxx>
> Sent: Saturday, January 27, 2007 11:52 PM
> Subject: [bcab] Re: possible fan problem
>
>
> > Hi Alan,
> >
> > There are at least 2 fans in the PC, one inside sitting on the processor
> and
> > one on the power supply. The one on the power supply is bigger and,
> > therefore, makes the most noise when it's working. Unfortunately that's
> the
> > harder of the two to replace. With the processor fan you just buy a new
> > heatsink and fan and it's easy to fit. With the power supply fan you
have
> to
> > remove the power supply unit, unscrew the power supply, unscrew the fan
> and
> > disconnect the wire to the board. Sometimes there's no connector and
it's
> > soldered directly to the board of the power supply. So it's a real
mission
> > to change it.
> >
> > You can oil the fan to get it moving again but that's just as tricky as
> you
> > have to get the fan out so you can peel off a sticker in order to add a
> drop
> > of oil to the bearing. But that's worked for me in the past when I
haven't
> > got another fan to use.
> >
> > But the big question is whether it really is the fan. In my experience
> they
> > don't just stop without warning. They make strange, grinding noises for
a
> > while mixed with normal sounds before they pack in completely. And if it
> has
> > stopped - basically because there is too much friction - you can kick
> start
> > it. You turn on your PC and stick a pencil or similar instrument through
> the
> > grill at the back - perhaps use something that isn't a conductor if you
> feel
> > nervous - and flick the blades. That will normally kick it back into
life
> > and you'll know that the problem is the fan.
> >
> > If it's just that the fan is broke the computer should begin to start up
> > andd you'll hear the usual beep at the beginning and there'll be the
> flicker
> > of lights on the keyboard and, of course, the screen will show it's
> booting
> > up. But without the fan moving it will overheat after a while.
> >
> > Obviously you shouldn't use it if the fan isn't working but it shouldn't
> be
> > difficult to work out if this is the problem rather than it being, say,
a
> > fuse.
> >
> > Cheers,
> > Steve
> >


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