Low 5v rail in antec neo-he 380

[fabricator]

Testing it with just a 12V fan and all the rails come out within range. But connect it to the motherboard and it won't even post, the 5V rail measures 4V, but all the other rails are fine, even the 3.3V.

There is also a very fast clicking sound from the mobo speaker.

There are also a variety of suspect looking brand caps in there, none are buldging or leaking though. I'm not sure if a bad cap would cause a voltage drop like this.

What other components would cause problems like this ?
Faulty rectifier is about the only thing I can think of.

As a point of interest had to send back another antec PSU a few weeks back, it had faults with the 5V and 5VSB rails.

[tazwegion]

Re: Low 5v rail in antec neo-he 380

The trouble is not all capacitors will bulge when becoming disfunctional (read as FUBAR), my TruePower380 had a sagging 5v line like yours only mine would boot, reboot & boot/freeze some more

Replacing all the secondary cap's did the trick (thanks to the guidance found here), and that very same PSU is now running my A64 3000+ rig beautifully!

[fabricator]

Re: Low 5v rail in antec neo-he 380

Well thats a new one symptom, something funny on that rail for sure.

For interest the follow caps on the secondry side:
teapo, Ost, JP ce-tur
Mostly Ost on the rails themselves

The build quality on this PSU is awfull, found a dry joint on a SMD ceramic cap the other day. All sorts of loose bits of solder clinging from pins and leads almost touching.

[fabricator]

Re: Low 5v rail in antec neo-he 380

I replaced all the caps on the 3.3 and 5V rails, as I was out of 16V caps I only replaced one of those.

Still doesn't work, in fact I had trouble getting it to start. Basically if you plug it in with the atx power bridged on nothing happens. Wait a few seconds though and it works then.

5Volt rail still not good though. My only thought is the HV electro is bad too.