Power Supply Tester LED Help

I have my motherboard breaking, 2 in a row, so I thought I would test the powersupply. I bought a tester from coolmax, and when i plugged in my PSU, all the green lights came up, except one, the -5V.
The leds are:
+3.3V
-12V
PG
+5VSB
+12V
-5V
+5V
All light up green, except the -5V. Does this mean my PSU is not good or the -5V does not need to be green? HELP! Cluless! Thanks!
CubbybulinAsked:
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Irwin SantosComputer Integration SpecialistCommented:
-5v no green = bad..
replace your power supply
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CallandorCommented:
The negative voltage lines are old legacy lines from the AT days and aren't needed today: http://www.gamepc.com/labs/view_content.asp?id=psroundup&page=1&cookie%5Ftest=1
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CubbybulinAuthor Commented:
Ok, another question: when I unplugged the tester, left the power supply on, and in a while I plugged the tester back on, and the only light came up was the +5VSB. Is this normal?
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Irwin SantosComputer Integration SpecialistCommented:
+5 vsb is your power good.

it's normal
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Irwin SantosComputer Integration SpecialistCommented:
What you really need to check for is tolerance within the rate settings.... so a voltmeter would be more appropriate..

but if 2 motherboards went in a row.. I would simply replace the power supply and make sure that I have a UPS  running on the system.
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CallandorCommented:
+5VSB is used for standby power, to sense when Wake On ___ events happen.  It always is on while the power supply is plugged in.  What model power supply do you have?  It certainly is odd that two motherboards in a row went bad, but then I had bad luck with an Abit motherboard that required three shipments before I got a working one.
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compfixer101Commented:
are you sure it is the PSU causing the problems not improper standoff inserts

cf101
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CubbybulinAuthor Commented:
No I am not sure, I am trying to figure out what causes the motherboard to break. What is standoff inserts?
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CubbybulinAuthor Commented:
and what is the proper way for standoff inserts?
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CallandorCommented:
The brass or nylon posts that your motherboard sits on top of are standoffs.  The brass ones should only be installed where there is a hole in the motherboard, or it will cause a short on the motherboard.
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CubbybulinAuthor Commented:
They seem fine, but i will double check. Do they need washers or the screws by themselves should do it?
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compfixer101Commented:
the screws should be fine  but if you want to use a NON-CONDUCTIVE washer material that would be fine
cf101
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CubbybulinAuthor Commented:
the weird thing is with both motherboards that I could not turn the computer on at all, but if I unplugged the P4 plug from the motherboard, and turn the computer on, the lights would come up, fans would work, and so on. No picture, the monitor would not sense the PC, but all the fans and lights were working. When I plug the P4 plug back, and turn it on, nothing. Weird.
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compfixer101Commented:
well maybe the standoff was shorting out it from being in a area where those wires go?!

cf101

if you have one motherboard left that is failing try using a multimeter to test continutity from the ground to that power plug should be two ground  (black wires) and two +12VDC (yellow wires) on that plug
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CallandorCommented:
What power supply do you have, and what are the specs on each output voltage?
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CubbybulinAuthor Commented:
I dont have a multimeter. How much one costs?
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compfixer101Commented:
it could vary from $2 way up to $750  

i would get a digital auto ranging multimeter with fuse protection  (actually i have that already)
mine is from radio shack  works great for me.

i wouldn't get a cheap model   i would get one at least $20  and maybe a warrenty on it for a few yearssince things do happen.

cf101
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Irwin SantosComputer Integration SpecialistCommented:
@cubbybulin...did you forget us?
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CubbybulinAuthor Commented:
Sorry for that! :)
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Irwin SantosComputer Integration SpecialistCommented:
cool. thank you!
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