Sounds like something that happened to me a couple of years ago with an old system.......
Does your system have a floppy drive??
My floppy drive died and took the power supply with it.
When the floppy died, all the smoke was released from the power supply...;-)
Worth a look. BOL.
"When the floppy died, all the smoke was released from the power supply...;-)
Worth a look. BOL."