I can't speak to the RMA process for the Frame, but my limited edition white Steam Deck needed to be sent in, I think months after you were no longer able to buy the white one (and it was probably my fault it broke).

They sent me a brand new one. Limited edition white.

Valve's customer service has been exceptional in my experience.

This is really sad news :( I had hoped that Valve's Frame would keep running and not hit these sorts of dead ends. How comfortable are you with opening up the battery in the back? IFixit was able to get it off (and out) here: https://vr.org/articles/steam-frame-ifixit-teardown-battery-glued-fan-2026. If it were me, I would open it up and make sure all the connections still had good contact.

Weirdly I've heard that this is sometimes tied to tbe IPD lock, and some folks have had success in booting it back up after unlocking it. I don't have mine just yet thanks to a shipping delay so I can't exactly confirm or deny, but I've heard that floating around. Trying to mentally prep for any potential RMAs myself 👁️👄👁️

I've had similar issues, where the Frame would shut down and not charge, although, the device would still have some charge left, I kept the power button pressed long enough (maybe 30-60s) and then the frame turn back on with 40% charge....

Not sure if this is the same problem here, but maybe try that?