Won’t power on or charge

@jarrodwright not powering up could be related to the not charging. You do want to take a look at the charging board. that is the board where the USB port is connected to. Check teh flex cables from that boar to the main board. They have a tendency of coming loose in the connector and even to develop micro tears. Check your battery and battery connector. Personally I'd replace the charging board since that is always the prime suspect. Since iFixit does not yet have a specific guide for that, use something like this teardown Galaxy S23 Teardown and this video to get to the charging board.

Once you get power to the phone and ist is still not charging, we will have to dig a bit deeper and use the schematics to check some components. For that you'll need a multimeter etc. Let us know what you find out.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!