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Power Supply

By agipson ·
Last night I installed a motherboard in a friends mini-tower.
That was easy but I can't figure out why I'm not getting any power to the CD-Rom drive,the main power-switch and the fan on the power supply is not working.
My friend said when he bought the tower and power supply the tech tested the power and it worked but he also said the fan was not hooked up.
What troubleshooting methods are required.

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Power Supply

by bart777 In reply to Power Supply

Sounds like the cable from the power switch to the motherboard is on the wrong connection. Take a look at the paperwork that came with the motherboard and make sure that the power switch connector is on the right jumpers..

Some motherboards alsowill display on the board where this switch is to be plugged in. If the wires are correct, verify that you don't have the jumper backwards.

Best of Luck..

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by agipson In reply to Power Supply

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by jctech In reply to Power Supply

You need to watch polarity on the power and hard drive LEDs, but there is no right and wrong polarity for the power and reset switches...they are simply a set of make and break contacts. Just be sure they are connected to the correct pins on the motherboard.

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by agipson In reply to Power Supply

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by Shanghai Sam In reply to Power Supply

With the atx power supply connected to the main board you should get a +5v and a -5v from the power supply and a +12v -12v for any switch supply voltage from any connector.
It sounds like the power supply is bad.

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by agipson In reply to Power Supply

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by Shanghai Sam In reply to Power Supply

If this is a AT/ATX dual power source motherboard, most of them have a jumper to enable/disable the power switch.
You will have to check this jumper also.
Unfortunatly this information is usually buried deep in the setup section.
Regards, Chris

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by agipson In reply to Power Supply

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by Shanghai Sam In reply to Power Supply

make sure the connectors p8 and p9 are connected properly to the motherboard.The black wires should be pointing in at each other.

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by agipson In reply to Power Supply

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