Turns on but won't boot

I have an I747 that was running CM13. It was fully updated, NJ2. Had TWRP 3 on it. It was running great and one day the battery died. It charged for a little and will turn on, but not go past the CM guy logo. I tried booting into recovery and same thing, I get the TWRP logo but doesn't go beyond that. It goes into recovery but it's not recognized by the pc when connected. It's almost like the internal card went bad, and that's why it turns on but won't boot. Any ideas? Any help is appreciated