Re: ti4200 video fan not on

Could be the fan itself, I had a similar problem with the Northbridge
fan on my Gigabyte mobo... that would run and stop.

I stripped mine down and applied a blob of high temperature oil to
it's bearings which cured the problem, but you do need to be careful
to do this, if it is the fan then the only sure way is a
replacement.

I checked mine on a small 12V power supply or battery as mine was
marked 12V, making sure you get the polarities the correct way round,
the voltage rating is usually marked on the fan and that it is
dis-connected from the card/mobo.
But do bear in mind when doing this the fan is not blowing heat which
may affect it's bearings, mine certainly 'spluttered' doing this.

Having said that it could be the fan servo, or more correctly the fan
switching circuitry on the card/mobo since that there is only 2 wires
there is no servo speed control.

If you take this repair route you do need to be very careful, in many
cases you'll need to remove the sticker on the back of the fan,
remoce the plastic retaining clip and away the blades comes, you must
ensure this clip is replaced & recovered afterwards, making sure
not to bend or distort the blades themselves.

One sure thing is to try a different card, I am saying all this
assuming that the computer runs ok otherwise and understanding that
it's a fan fault only, if not then I would suspect some other fault
which may not be fan related.

Davy

.

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