Valve · Handheld PC
Steam Deck
Steam Deck LCD · Steam Deck OLED
Volume Up + PowerHold + press
BIOS menuHold Volume Up, press Power, then release Volume Up after the chime.
Volume Down + PowerHold + press
Boot managerPower off, hold Volume Down and press Power; release after the chime.
Manufacturer verified · checked
Valve documents both controls for the LCD and OLED Steam Deck revisions.