Resurrecting a dormant modded OLED - no screen, red light on HWFLY chip

So tl;dr, had a Switch OLED that was modded that just sat on a charger for months. Went to grab it the other day and it appeared to be dead (no charging indicator on screen).

I've tried rebooting a few times on a charger/not on a charger... typically start with flashing purple light into a solid red/solid yellow. I don't think it was dropped, but I saw that red is a bad joint possibly?

Is there any way to get the Switch to boot into anything at this point, or is the only way to further diagnose is to open it back up and poke around on the solder points?