Bliss ATX-300 anything but - no PW_OK

[pfrcom]

Motherboards won't fire up with this power supply
If I force it on by shorting PS_ON and GND, with an old disk as load, voltages are about right with exception of PW_OK which shows 0.059v
Could those little capacitors near the grey PW_OK wire in the second pic be the culprits, or is problem likely to be something more fundamental ?

[c_hegge]

Re: Bliss ATX-300 anything but - no PW_OK

I run into these quite a lot at work (often with bad fuhjyyu caps). I'm pretty sure it's a CWT, possibly from their ISO range. I wouldn't bother fixing it TBH, since it doesn't look that good.

[momaka]

Re: Bliss ATX-300 anything but - no PW_OK

I'm pretty sure it's a CWT, possibly from their ISO range.

Correct.
I have 2 of these under the names of Cyberlink and TurboLink. Both are pretty gutless, but they do work nonetheless. I only use them as bench PSUs for non-computer, non-critical hardware (i.e. playing around).

[Shocker]

Re: Bliss ATX-300 anything but - no PW_OK

Those ISO series supplies often have General Purpose capacitors such as Fuhjyyu TN and Teapo SEK. Don't use them like that.

[dmill89]

Re: Bliss ATX-300 anything but - no PW_OK

Those ISO series supplies often have General Purpose capacitors such as Fuhjyyu TN and Teapo SEK. Don't use them like that.

In theory if a PSU was properly designed to work with GP caps it can keep the ripple within acceptable levels, although any PSU cheap enough to have GP caps probably skimped in other areas as well, although the CWT ISO series is probably one of the better built "cheap" PSUs.

However I'd personally be hesitant to use a PSU with GP caps on the secondary on anything newer that a Pent III machine.

[Shocker]

Re: Bliss ATX-300 anything but - no PW_OK

In theory if a PSU was properly designed to work with GP caps it can keep the ripple within acceptable levels, although any PSU cheap enough to have GP caps probably skimped in other areas as well, although the CWT ISO series is probably one of the better built "cheap" PSUs.

However I'd personally be hesitant to use a PSU with GP caps on the secondary on anything newer that a Pent III machine.

The General Purpose caps in them ISOs fail a lot. I would replace them on sight, regardless of brand, in anything somewhat modern.

[dmill89]

Re: Bliss ATX-300 anything but - no PW_OK

The General Purpose caps in them ISOs fail a lot. I would replace them on sight, regardless of brand, in anything somewhat modern.

I'll definately agree with that, especially the Fuhjyyus