Touch screen stopped working on my Steam Deck. This is a pretty good instruction on how to fix it: https://steamcommunity.com/app/1675200/discussions/1/3186864655202361138/?l=schinese&ctp=2
- Power the Steam Deck down normally (choose Shut Down from the Power menu)
- Hold down the Volume+ button and press the power button. The Steam Deck should boot into the BIOS menu.
- Using the D-Pad and A to select, navigate to “Setup Utility”
- Navigate to the Power Menu
- Choose Battery storage mode, and confirm.
You should see the Steam Deck power off, and the power LED will blink three times to confirm battery storage mode.
Plug the Steam Deck in to the supplied power supply. Turn on the Steam Deck.