It is not entirely clear what problem you are alluding to so it might be best to spell it out.
I wouldn't have thought so but it might depend on what the actual problem is.
My guess would be, with the the screen plugged in, it is affecting or loading 3V3 or some other voltage rail from the MxL7704 PMIC such that it doesn't complete its power-up sequence, doesn't release the SoC from reset. With the screen removed it can successfully reach a 'power good' state so the SoC is released from reset and boots up.arkader wrote: ↑Thu Aug 16, 2018 12:16 amthe exact problem is that when I plug a waveshare touchscreen on the pi 3b+, it won't boot... red light is on, but no act (seems like the sd card isn't even read).
While it's stuck in this state, I can unplug my screen, the green light will start blinking, and the rpi will start booting.
That does seem to prove that add-ons connected to the MxL7704 3V3 rail can affect or load that in a manner which prevents a Pi 3B+ from booting. Severing that connection allows booting to proceed.
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