Psu

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BlackKnight

New Member
So, I think my power supply has gone bad in my computer, but I don't have an extra one to test it.

Does anyone have an extra PSU that I can borrow for like a day just to see if my computer turns on?

Thanks!
 
aps45819

aps45819

24/7 Single Dad
BlackKnight said:
Yeah, I just purchased one of those, I'm not entirely sure how to use it, but hopefully I can figure it out.
Click to expand...

The wires going to the connector where you plug in the power power cord are the input, 110 vac.

All the others are various DC outputs. There should be a label on the power supply telling you which is which.
If not, set your meter to a high DC voltage connect to a wire pair and step the meter down until you get a reading.
Ground (return) might be a common wire for more than one voltage
 
aps45819

aps45819

24/7 Single Dad
AC, alternating current, will grab hold and shake you.
DC, direct current, will punch you

The outputs on a computer power supply shouldn't knock you very far
 
GopherM

GopherM

Darwin was right
aps45819 said:
put a meter on the output
Click to expand...

You might also have to check the PSU output under load. Sometimes power supplies will read OK as long is nothing is drawing current from them. If it checks OK while disconnected, hook it back up and find one of the first places it feeds power to on the motherboard and check it again. There should be a fuse link or something between the power supply feed and the first place the juice goes to on the motherboard.
 
huntr1

huntr1

.
GopherM said:
You might also have to check the PSU output under load. Sometimes power supplies will read OK as long is nothing is drawing current from them. If it checks OK while disconnected, hook it back up and find one of the first places it feeds power to on the motherboard and check it again. There should be a fuse link or something between the power supply feed and the first place the juice goes to on the motherboard.
Click to expand...

SMARTCO can hook you up with a power supply.
 
GWguy

GWguy

*
It might not be the power supply. If it's a newer switched supply, it takes commands from the motherboard to turn on and off and supply power. As such, the voltages supplied are not what you would see when commanded to turn on.

If the motherboard fails, the power supply cannot be commanded to turn on.

You really need something like this to check it out:
PC Power Supply Tester by Coolmax with LCD

Swapping out the PS with a known good unit works too.
 
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BlackKnight

New Member
GWguy said:
It might not be the power supply. If it's a newer switched supply, it takes commands from the motherboard to turn on and off and supply power. As such, the voltages supplied are not what you would see when commanded to turn on.

If the motherboard fails, the power supply cannot be commanded to turn on.

You really need something like this to check it out:
PC Power Supply Tester by Coolmax with LCD

Swapping out the PS with a known good unit works too.
Click to expand...

So I thought that it might be a bad mobo too, and I'm currently using the Abit IP35 Pro, which only cost like 60 bucks now.

The PSU tester you showed is similar to what I bought. Now that my focus is not the Superbowl, I'll check everything out tonight.
 
Floyd2004

Floyd2004

-Void-
With the PSU not connected to anything in the case. Jump the green wire on the 24 pin cable to any ground on the 24 pin cable. This will allow the PSU to power up for testing. As for the pinouts, a simple google search will net you the correct outputs for the various connectors.
Cant wait for the pics... Hope its not some H50/H70 premade junk.
 
B

BlackKnight

New Member
Floyd2004 said:
With the PSU not connected to anything in the case. Jump the green wire on the 24 pin cable to any ground on the 24 pin cable. This will allow the PSU to power up for testing. As for the pinouts, a simple google search will net you the correct outputs for the various connectors.
Cant wait for the pics... Hope its not some H50/H70 premade junk.
Click to expand...

It's definately custom, I did not want to do the H70 kit.

As for the jump...I've actually tried that before, but never been able to successfully keep a charge. I've used a paperclip, as well as stripped (very thin) wires, and I can get the PSU to light up for like a second, but not to actually stay on. What's your method of jumping it?
 
Floyd2004

Floyd2004

-Void-
I just told you my method for jumping...
Jump the green (PS ON) wire to any ground and it should turn the PSU on.

If your PSU does not turn on then im afraid its dead.
 
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