So it was Saturday night and there was an Ubuntu Update …
1. Checked the power switch with a continuity test across the header … OK
2. Did the ATX PSU test by shorting the PWR.ON and GND connector on the ATX connector … nothing happens. At the very least, the PSU Fan would come on when this is done. So … it looks like I need a new PSU.
It was 4pm and rush hour today would be even worse due to the “buka-puasa” traffic, so after breaking fast, I dashed off to PJ Digital Mall (roads were empty! even the Federal Highway!) and got a replacement PSU.
Connected it up, and PC is back in business! Which means I have to start doing work again tomorrow.