MinisForum UM690 - no boot

This is a neat little PC I came across. I bought it as non-booting, not turning on. Got a good deal on it, so I bought it. Has some nice specs - a Ryzen 9 6900HX. I noticed there were no shorts on the input, so no shorted MOSFET&rsquo;s there. Yet no boot. I did found a voltage rail that was shorted to ground. But what&rsquo;s shorted? The regulator? Or the caps? By injecting some voltage onto the…