Try upgrading the UEFI. Do NOT use the reset to default option on firmware 118. It’s bugged and will cause additional problems.

If you’re already on 118, I would first try to reapply it. If nothing changes, then downgrade to 116 and check. If functional again, upgrade back to 118.

Note: I sold my original Deck, so I can’t be sure 118 is the current UEFI version.

I had previously used the restore defaults option on 118 while troubleshooting an unrelated problem, and that caused the sound and touchscreen to stop working. Downgrading to 116 and back to 118 fixed it.