This exact situation and screen happened to me as well, even up to the “3 Failures since…” alert. Deck was restarted after applying update and I get this same screen, no controls, no amount of attempting resets (Vol+ & Power, BIOS menu, 3-sec and 10-sec holds) seems to have any effect. No chimes, etc like OP. Preparing to open up a Steam Support Ticket but hoping against hope there’s a simpler solution than setting up an RMA.
So far no luck. Been troubleshooting with Steam Support but booting into BIOS, CMOS resets, controller board resets and the like haven’t changed much so far.