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Problem after connecting case fan to 5V from PSU

Mussels

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#76
sir,Im an new to serviceing of Cable tv equipments,my question is,when i was repairing a optical transmitter the power supply is working fine and it has 12v,5v and -5v output,but 5v colling fans wire is connected from main motherboard,there is no 5v voltage output from fan connecting socket,and i want to connect 5v colling fans directly from power supply board..plz anyone can guide me..
just connect the wires from the fan to a 5V source and a ground. thats it.
 
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#77
Why did the mainboard stop outputting 5v? I don't see any reason you couldn't connect a 5v fan to a 5v source like the power adaptor. Just make sure the adaptor has enough power. It should since it was likely providing the 5v that the mainboard fed the fans with.