Or for future reference, you can boot into the stock recovery (for factory reset) as follows:
- turn the projector completely off (e.g. long-hold the power button)
- make sure there is nothing in the USB-A port
- insert a pin into the ‘recovery’ pinhole. Two pinholes are one the side of the PPM; recovery is the one closest to the usb-c port (the other is a hard reset)
- while pressing the button inside this pinhole, power on the projector with the power button. Release the power button, then release the pinhole.
- You should get a screen with a robot, and the text “no command”. This is the stock recovery.
- Press the ‘power’ button, and while holding it press ‘volume up’ on the device. This should bring you in the recovery menu.
- You can navigate the menu with the volume keys, or the remote control via IR.