promaty

Well I gave up on finding track for tachometer signal. My friend suggested adding some resistance to the fan's input wire, guess that would be the solution. No fan control, but at least not so loud. Thanks for the help though.

Back: http://img573.imageshack.us/img573/1921/48262530.png Front: http://img825.imageshack.us/img825/1286/52881783.png So the fan works, when I solder bottom two wires (black and red) , but nothing changes whether I solder yellow one or leave it hanging.. It just not connected to any tachometer signal receiver on the board. I have no idea how it was working before.. Maybe there are some alternative solutions for lowering fan's rpm?

Thanks for reply. Unfortunately I don't have a voltmeter.. I'm not sure about the voltages, but I know that power goes through red/black wires, because fan forks without connecting the yellow one, so that is definitely one for tachometer signal. On the photo you can see, that yellow wire goes in to an empty spot and is not connected any further, so tachometer signal doesn't reach its destination. Why is it like that? Any other ideas how to reduce fan's rpm?

Hello, I accidentally ripped off 3-pin fan connector when I was cleaning the dust.. I've managed to solder it back, but the tachometer wasn't working anymore, no software responds to it, and the fan is now always running on full power (very loud, I'd guess more than 5000 RPM) When I took a closer look, I saw that 12V wire for tachometer was going into an empty spot on the circuit board like black wire for the ground, so nothing happens when I solder back it back, computer receives no signal about fan's rpm.. Can anyone explain me this? Front: http://img827.imageshack.us/img827/8199/pic11h.png Back: http://img521.imageshack.us/img521/9830/pic12a.png Perhaps someone could post similar picture clearly showing 3-pin connection on the both sides of the board? (something similar to 4870 is OK) Thanks.