Hello!
I just tried to update to 3.5.5 stable, but upon restarting at the end, my Deck was stuck on the boot logo and did nothing. I waited about 5 minutes to no avail. I tried forcing it off and back on again, same thing happened.
I have fixed it - holding … while powering on to get into the boot menu let me roll back to the previous version. But what does this mean for me now? Should I try the update again? Or leave it?
I’d try the update again. I’d wager this was an issue applying the update, not an issue with the update itself. If it happens again, you know what to do to reverse it, and know not to update until maybe the next update, or reach out to valve.