Many problems with A1 mini

I’ve been asked to troubleshoot an A1 mini. Owner has replaced several parts (but I don’t have a list). When picking up the unit I can see one connector on the logic board is disconnected and the location for it seems to have bent pins.

I will be watching videos here and on YouTube. Just thought I’d kick things off here asking the community for some advice.

I figure I’ll have to do a factory reset so I can add the unit to the app on my phone.

All advice appreciated, especially any good YouTube troubleshooting links. Thanks.