Default HELP! SCH R970 US Cellular GS4

Hi. I am trying to help my brother. He has rooted his GS4 from US Cellular and has an old version of TWRP on it (2.6.0.0), but his phone stopped charging. I can wipe and install ROMs, and it seems to charge until I power the phone back on then it just goes to the Samsung boot up screen and freezes. I was thinking maybe it was because of TWRP being an old version, but I can't connect to my computer because I can't get it to recognize the phone.

Again, I don't think it's the charging port because when I boot up after initially installing a new ROM it shows it's charging. Any help would be GREATLY appreciated. Thanks in advance!

SCH R970 US Cellular GS4