That last #SteamDeck update really borked my system. I had to do the same fix that I have always had to do. I don't know why it works, but it does.

I had to open it up & unplug the battery cable & then plug in the AC adapter & turn on the system. Once it booted up then I had to shut it down. Remove the AC adapter. Plug the battery back in & put it back together.

It's been awhile since I've had to do this but I have had to do it a half dozen times over the last several years.

@Judeau Huh. I had to do it once (shortly after the warranty expired!) but just once so far.

@Thad It's such a strange issue. I guess it has something to do with the sleep mode and battery state. I don't know.

It's definitely irritating when it happens but I'm glad it is a relatively quick fix.

Do you have a regular steam deck or an OLED? I'm curious if the OLED models have this issue? I know they had some tweaks to their sleep mode and Bluetooth and I feel this problem might be related.

@Judeau I've got the old, non-OLED model.
@Thad Cool. Same here. I'm willing to bet the OLED model fixed this issue, but it's just a guess.
@Judeau That is indeed weird. I've never had to do that with my 256 GB LCD model.

@seq I have never had it happen in relation to an update before this one.

Usually it happens when I put the system in "sleep mode" and it wont wake back up even when holding the power button for 10 seconds to force a reboot.

Its a known issue as i found the solution online.

There are several other things that seem to trigger the issue. The deck will appear to be off but then it starts to get really hot and the only fix is to unplug the battery cable and boot it back up via the ac adapter.