Buzzing PSU

radio · 28 Jun 2006 at 16:14

Sometimes when I go to poweron my PC, it won't start up, and the psu is making a very high pitch buzz. It comes and goes. When it goes, I can turn on the PC, when the buzz returns I can't turn the computer on.

Any ideas? Is my psu dead?

iBot · 28 Jun 2006 at 16:16

Make/model of the psu in question.

radio · 28 Jun 2006 at 16:17

It came with my Antec sonata 2: SmartPower 2.0 450W

Also, this has just happened, it has been working fine for a year now.

Joe42 · 28 Jun 2006 at 19:28

Are the fans spinning when its buzzing?

I've got an old one i'm using as a bench psu thats started doing this, i think its the fan bearings.

radio · 28 Jun 2006 at 20:13

Joe42 said:
Are the fans spinning when its buzzing?

I've got an old one i'm using as a bench psu thats started doing this, i think its the fan bearings.

No, no fans, it's not that sort of noise. Very high pitched, and it also makes my plasma buzz also.

Joe42 · 28 Jun 2006 at 22:20

Does it change as you load up the cpu?

I know of a system that does this, and its actually the board thats causing it but its very difficult to tell. Loading up the cpu gets rid of it.

radio · 29 Jun 2006 at 00:01

Joe42 said:
Does it change as you load up the cpu?

I know of a system that does this, and its actually the board thats causing it but its very difficult to tell. Loading up the cpu gets rid of it.

If the PSU is buzzing then the PC won't power on. Nothing. Zip. After I cycle the power on the PSU a few times, it will stop buzzing and will then power on the PC.

Hope this makes sense.

Tetras · 29 Jun 2006 at 00:04

Can you borrow another PSU (for testing)? Cos it sounds like yours is borked.

radio · 29 Jun 2006 at 01:09

Tetras said:
Can you borrow another PSU (for testing)? Cos it sounds like yours is borked.

Yeah, I guess that's the best thing to do. I'll try and get my brother to lend me one, but his not going to be too happy.

Nami · 29 Jun 2006 at 09:36

Perhaps just try a new power cable first, even if just to eliminate that from your enquiries. It's a whole lot easier to change a power cable than it is a whole PSU!