YABLS? (Yet Another Boot Loop Snafu?)

So I have read through quite a few bootloop posts but still haven't managed to resolve my issue (am very close to trying oden 2 linux...). **Device**: samsung galaxy tab a (sm-t350) **what I did**: Using heimdall I sucessfully flashed twrp to my tablet. Noticed I had forgotten to dl the rom (lineage retiredtab) so booted into stock android, downloaded the rom, then booted back into twrp and flashed the lineage retiredtab rom , then rebooted. **What happened:** when i rebooted I am stuck in a bootloop i guess? and no matter what I do i can't seem to do anything other than reboot and boot into "odin mode". I can't boot into recovery and I can't power down. the many of the button combinations seems to require the device be off, but as i can't power off I can't seem to use them. **What I can do:** I can get to the odin mode "downloading" screen - and I can flash twrp (I just can't boot into twrp) and I can reboot - which just takes me to the lineage booting animation.