Thermaltake 750W

[Nuke]

http://www.newegg.com/Product/Product.a ... 6817153136

Um, I think that my PSU is broken. I don't have enough expertise to get it working, and my replacement's warranty has expired.

So I'm just stuck here doing nothing.

Any help you guys could provide?

The fan isn't spinning and the power isn't coming in. That's really all that I know...

[shovenose]

Alrighty, let's try a few things:
1. Clean out any dust to the fans
2. Make sure all internal connectors that go to the motherboard, hard drive, etc. are connected, and that it's properly connected to a power source and the switch on the back is set to on.
3. Does it now work?
4. If not, short the green pin on the 24-pin connector with a black pin, using a bent paperclip. (INSTALL PAPERCLIP WHILE POWER IS UNPLUGGED, THEN WHEN POWER IS PLUGGED IN DO NOT TOUCH THE PAPERCLIP!). Use an old hard drive as a load and see if when you apply power to the PSU if it works. What the green does it's the PS_ON and by shorting that to ground it basically thinks it's hooked up to a motherboard and the computer's power button was pressed.
5. Still no luck?
Read this and then let us know
http://hardwareinsights.com/2011/04/ ... ply-works/

[c_hegge]

(INSTALL PAPERCLIP WHILE POWER IS UNPLUGGED, THEN WHEN POWER IS PLUGGED IN DO NOT TOUCH THE PAPERCLIP!).

Huh? there's no problem with touching the paperclip. The PS-on signal is only 5v. I do it all the time.

In any case, a shot of the internals would be nice as well, just so we can see what we're dealing with here.

Also, test the 5vsb with a multimeter (positive lead to purple wire on ATX conntector, negative lead to any black wire), that might tell us where the problem lies if checking the basics doesn't help.

[shovenose]

(INSTALL PAPERCLIP WHILE POWER IS UNPLUGGED, THEN WHEN POWER IS PLUGGED IN DO NOT TOUCH THE PAPERCLIP!).

Huh? there's no problem with touching the paperclip. The PS-on signal is only 5v. I do it all the time.

In any case, a shot of the internals would be nice as well, just so we can see what we're dealing with here.

Also, test the 5vsb with a multimeter (positive lead to purple wire on ATX conntector, negative lead to any black wire), that might tell us where the problem lies if checking the basics doesn't help.

But... it's still dangerous. if the PSU is seriously messed up it could carry lethal current!

[Galib]

Hi Nuke,
Are You getting +5V PS_ON and +5VSB ??

[c_hegge]

But... it's still dangerous. if the PSU is seriously messed up it could carry lethal current!

I disagree. As I said, I do it all the time when troubleshooting questionable power supplies. If a power supply was really that messed up that mains voltage was getting to the secondary side, it would destroy itself and blow the fuse. (And there would be some serious burn marks on the motherboard).

[Nuke]

I'm not getting anything.

Also, there's no light to be green.

Although I didn't really understand the "short the green pin on the 24-pin connector with a black pin, using a bent paperclip." thing. In particular, the "short", "with a black pin", and "using a bent paperclip" parts.

[c_hegge]

We meant something like this

[c_hegge]

In any case, though, if there is no 5vsb, then you can forget this step. The first thing to do would be to check the fuse inside the power supply. If it's blown, then you have a shorted part somewhere in the primary side. If not, then it's a problem with the 5vsb circuit.

[c_hegge]

The best picture of the Internals I could find is the Hardware Secrets one. I have circled the fuse in the picture. the easiest way to test it is to measure the resistance between the two pins with a Multimeter. If it shows shorted (or very low resistance), then it's OK. Otherwise, it's blown.