Power supply tester -5v isn't lit

Asus M2a-vm desktop board
October 18, 2010 at 15:02:04
Specs: Windows XP Pro SP3, 2gb
I have a bunch of "Power Supply Testers". When I plug in any power supply all the lights go on except -5v. What does -5v do and why doesn't it light? According to all pictures it seems normal.

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October 18, 2010 at 16:12:04
The chances are your power supply doesn't have a -5 volt output at all, it is not needed on modern computers. Older types of memory used the -5 volt rail.


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October 18, 2010 at 19:13:35
OK, Thanks

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October 18, 2010 at 19:27:55
Look at the wires going to the motherboard if no white wire then no -5

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