PSU got negative output!! help

[Brian C]

Re: PSU got negative output!! help

The problem of his power supply is the Power Good (PG) signal line (Grey color). It reads low instead of 5V. All other outputs are fine. Perhaps due to the supervisory IC or comparator problem...

[Krankshaft]

Re: PSU got negative output!! help

He he funny on 2 out of the 3 pics that extra port is cut out .

Thats why I don't use cheap multimeters.

Any meter I own must have autoscale at a minimum.

Aw Brain you beat me to the diagnosis .

Indeed the mobo won't attempt to power up the supply if the power good generator doesn't send out its 5 volts.

If all of the PSUs outputs are within range then replace the power good IC if you want to fix it.

Sometimes these ICs malfunction and prevent the PSU from coming on when connected to a mobo.

I have had wall wart switchers with dead PWM controllers after checking the FETs and output rectifiers for shorts I replaced the PWM IC and the PSU came back to life.

So ICs can die without being brought under by another component in the circuit.

[jdimpas]

Re: PSU got negative output!! help

Hello guys! thanks for dropping some comments, well the powersupply just blow up when i plug it again in the AC.. hahaha.. dammn powersupply.. made in china products!!.

[i4004]

Re: PSU got negative output!! help

i like happy-ends...

[Krankshaft]

Re: PSU got negative output!! help

i like happy-ends...

Good bye and good riddance .

[kc8adu]

Re: PSU got negative output!! help

the psu in the pic is something i would crush for hand exercise.
at least you got a fireworks show without losing a board or worse.

[jdimpas]

Re: PSU got negative output!! help

the psu in the pic is something i would crush for hand exercise.
at least you got a fireworks show without losing a board or worse.

yes, a bit fireworks! boomm.. haha.. well anyway thanks guys!