Dynex 400w ATX PSU: Power Good Not Lit

[bigbeark]

I installed this in a tower I was building. Runs but no post. Swapped out for another PSU - that worked.

Tested with my Thermaltake Power Supply Tester - the PG (Power Good) LED does not light.

Disassembled the PSU, no domed or leaking caps, no burn marks anywhere.

I can post pics tonight, but where should I start looking for the problem?

[Th3_uN1Qu3]

Re: Dynex 400w ATX PSU: Power Good Not Lit

If it doesn't give power good then obviously the power good circuit is where you should look in. Trace the gray wire coming from the ATX connector.

[bigbeark]

Re: Dynex 400w ATX PSU: Power Good Not Lit

Here's the pictures

[everell]

Re: Dynex 400w ATX PSU: Power Good Not Lit

Look at the switch on the back of the power supply case. Is it in the 115 volt position or the 230 volt position?

Here in the land of 115 volts AC, some power supplies with switch in 230 volt position will start, but power good signal will indicate bad. Start with the simple obvious solutions!

[bigbeark]

Re: Dynex 400w ATX PSU: Power Good Not Lit

Everell, thanks so much. I can't believe I didn't check the 115/230 switch. YES it was set to 230!!!! Got to put it back together to be sure. Truly a D'OH moment on my part.

[joshnz]

Re: Dynex 400w ATX PSU: Power Good Not Lit

My auntie brought a pc back fro a holiday from a 115v country to here in nz a did not set it to 230 after attempting to repair the psu found the transformer had gone open. all 90% of the parts in the pc cpu mb etc was all cooked.

[bigbeark]

Re: Dynex 400w ATX PSU: Power Good Not Lit

Just to confirm, I reassembled the PSU, set the switch to 115v, and it worked!
At least I used the opportunity to document all the cap locations and values in case I ever
want or have to recap it.

Thanks again, Everell!