PSU went bang :(

Tonight I decided to take the psu out of my cab and give it a closer look (And clean, the thing was a filthy frankenstein monster).

Once it had been inspected and dusted off, It went back in.
Plugged the machine in.

Loud crack and a flash.

The monitor then powered up as normal but to a black screen, as if there's nothing plugged into the jamma harness.

For a moment I thought maybe it was the Neo MVS mobo that had fried so I decided to plug another mobo into the jamma harness as a test. Same thing, monitor powers up but the board doesnt.

Can a fried PSU still power up a monitor like this? Or has something else gone in the cab?

I need a new PSU anyway to get a 6 slot board going so it's no big loss. Just a little freaked something else may have gone too!

PSU doesn't usually operate the monitor....

Well you learn something new every day...

So I guess it's just a PSU issue.

Cheers!

o1s1n said:

Tonight I decided to take the psu out of my cab and give it a closer look (And clean, the thing was a filthy frankenstein monster).

Once it had been inspected and dusted off, It went back in.
Plugged the machine in.

Loud crack and a flash.

The monitor then powered up as normal but to a black screen, as if there's nothing plugged into the jamma harness.

For a moment I thought maybe it was the Neo MVS mobo that had fried so I decided to plug another mobo into the jamma harness as a test. Same thing, monitor powers up but the board doesnt.

Can a fried PSU still power up a monitor like this? Or has something else gone in the cab?

I need a new PSU anyway to get a 6 slot board going so it's no big loss. Just a little freaked something else may have gone too!

Click to expand...

I thought that a loud crack and a flash would have normally meant that the power supply had exploded. >.>

Though then again, I would have been confused too if the Monitor powered-up but the mobo didn't after the PSU blowing up.

The neo style power supply just works as a passthrough for the monitor. It switches the ac from the outlet on/off with the power supply section through the switch to the isolation transformer and does nothing with the power. I have had that happen to two of my neo supplies so far. I repaired one...then it died again a few months later so now I just toss them and replace them when they blow...its not worth the time to work on them in my book.