I put a new fan in my HP Compac desk top power supply because it was very noisy (way out of warrantee) but it's not working. (Thermaltake, Thunderblade LED) I had to cut the power wires and splice the new fan to the old plug.  New fan same specs as the old fan.  6v starting and 12v to run and .16 amp draw.  The new fan had a FOUR pin connector and part of that I suppose is the led feature.  But anyway the new fan had a label that said 'Power' wrapped around the black and red wires so I spliced them to the red and black of the old plug.  I made good pig tail splices and taped them.  I called Thermaltake and the tech didn't know but said to put 12v to it to see if the fan might be defective.  Then he suggested using the four pin connector if POSSIBLE.  I didn't look because of the mass of wiring but just assumed it wouldn't match.   Any ideas?So why didn't you try the four plug like your technician has said?
Hi

Is this the TYPE of connector that plugs into a motherboard. If so the wiring is black is ground, orange is +12V,  Yellow is sense the speed output if there is a 4 th wire then this isn't used.  So if you only have 12 VOLTS use the black and orange wires.

Lisa_maree