My googling makes me think that the third wire may have RPM data. Can you bench test with a 'scope or dvm?
-Denis On Thu, Apr 24, 2014 at 5:39 AM, Russell Senior <[email protected]> wrote: > > I may have posted about this a while back, and I know I talked to > Keith about it a little once upon a time. I have an old ThinkPad > T60p. Its fan has been rattling for a while (still spinning, but > noisy). I ordered a replacement a while ago, but when it arrived, it > didn't have the right number of pads (either the GPU or the > Northbridge was missing), so the old fan/heatsink when back in with a > drop of oil on the spindle, which helped for several months. > > Recently, I took another run at it, this time apparently getting the > right part. I plugged it in, fired it up and got the dreaded "Fan > error". It shuts itself off after a few seconds. I have tried > various permutations of thermal grease (I had a tube of "arctic > silver" ... someone on a random thinkpad forum said it had worked for > him). I tried the old fan, and it now gives the same error. I tried > powering up the fan from a bench power supply (5V 0.25A) and both the > old and new fans spin on it. Neither spins in the laptop at power up. > There are three pins on the connector, blue (center) appears to be > ground, red is 5v, there is also a brown wire the function of which is > not clear to me. > > Not sure what to try next. Clues? Suggestions? Help? I'm > particularly interested in Keith's opinion (which, on the subject of > ThinkPad life-extension, I trust implicitly). > > TIA. > > > -- > Russell Senior, President > [email protected] > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
