I think I might have a defective unit. Starting today the projector keeps flashing on/off while I am either in HDMI mode, Android Mode, etc. It is connected to USB-C Power 65 watts and nothing else is out of the ordinary.
I assume you are positive that the lamp turns itself off.
I am asking because I had a few cases (not nearly as often as that) when the pico flashed a black picture when feeding in an HDMI signal. In my case the leds stayed on, it just went black. Could be a signal integrity issue, although the device was a firestick plugged straight in the back of the pico (and powered by its power supply).
The charger is not able to supply enough power so it’s switching between battery and AC power. There’s a momentary flash when this happens as the picture is readjusted. Are you using a cable that can handle 65W power? Are you using the supplied power adapter?
Sorry - I left the office before testing it again, but the adapter that was plugged in was a 65 Watt PD GaN adapter - the battery was low during that time and I have used that GaN adapter numerous times with this projector at home. So I guess that the projector needs to be fully charged with this adapter, because this is the first time for it to act up like this.
I will try to test it again either today or tomorrow if I have a chance.