@greytheearthling@queer.party It's not "just the battery", but you may be able to boot it with a charged one. Something's physically wrong with the power path, the red LED would blink without any assistance from software or even CPU if it was actually getting powered.

The "codes" are chips, the first one is USB-C controller and the second is battery charger. Either one of them is broken, or the USB-C socket went bad. There's still a chance the battery power path is intact.