Retimer replacement - not turning on

I still want to improve my repair skills, but currently struggeling with an xbox one x and running out of ideas.
I had a faulty xbox which was powering on, but no picture.
After replacing the retimer chip the box has no power at all - no function when powering on.

I checked my soldering and cannot see any issues (pic attached). Any tips how to solve this or what could cause such issues ?