I should note that I am also using the SD card interface and whenever the SD is not detected on power up the display doesn't work either. I believe they are on the same bus.
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Posts made by scaven92
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RE: Core2 and M5Unified display no longer worksposted in Core 2
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RE: Core2 and M5Unified display no longer worksposted in Core 2
@HappyUser I am running into the same problem. I had to remove the battery as the device would get into an unstable state and this made it easier to reset. I find I have to unplug the USB cable, which is powering the board multiple times to get it to work properly. Often having to perform this cycling 5-10 times until it works properly. The HW is working fine on the shipped demo firmware and I have confirmed this behavior on 5 devices. This seems like an initialization of the PMIC or the SPI interface that is non-deterministic or borderline. This only happened once I had to switch to the M5Unified.h library. Very disappointed at the moment.