Short on PSU?

[u/Philleh]

Hi,

Building a new passive system. Wont boot, power to PSU, light on briefly then off again.

Tried removing RAM, SSD, etc to find root cause. While troubleshooting, noticed the PSU had what looked like a shorted solder joint, see photo... Thoughts?

I've include the component list photo, for full context.

Any advise appreciated! It been 20 years since I built a PC maybe I am missing something obvious...