[ltp] fan error on boot for T40

[Brad Langhorst]

On Wed, 2007-09-26 at 07:10 -0700, bhaskins@chartermi.net wrote:
> ---- Brad Langhorst <brad@langhorst.com> wrote: 
> > I got this message a while ago, and heard that the fan was not spinning
> > anymore.
> > 
> > So I bought a used fan/heatsink, worked fine for a week or two, but now
> > i see the same fan error.
> > 
> > So I bought 2 more used fan/heatsinks thinking it was just a dud fan.
> > 
> > Now none of the fan spins and I have a useless laptop...
> > 
> > Anybody know which part on the motherboard could be the trouble, it is
> > possible to fix it?
> > 
> > I wonder if this is from using linux on this machine for years with weak
> > power management and too much fan action.
> 
> I doubt that very much, I have seen Dell and Compact laptops where
> the fan starts up after about 30 seconds and then runs constantly
> and that was true under several versions of wincrap. 
> > 
> > brad
> 
> I had that problem on a A30 and traced the circuit back as far as a SMD
> transistor.
> The transistor was ok but the circuitry is so dense I was not able to
> trace it any farther so I jumpered the collector and emitter pins together
> with a short piece of #30 wire and just let the fan run all of the time.
> The A30 fan is not loud and runs most of the time anyway.
> I am not !!! suggesting that you try this unless you have equipment 
> and experience working on SMD parts.
> I did the soldering using a 20x magnifying lens, it's about like trying
> to solder a harness on a house fly.
> The only other choice would have been to swap out the motherboard.
> ... Bert

i found a similar transistor, unfortunately there's no voltage making it
to the source side so my problem lies further away...

i'm just going to get a new motherboard - sigh.

thanks anyway!

brad