4. M5Core 2 and M5Core 3 will not light display

M5Core 2 and M5Core 3 will not light display

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    M5Basic runs sketches and sprites well connected to my MacBook Air (OS14.1.2). Using same setup and cable to two new M5Core2's and a M5Core3 will not even light the display, even after after pushing power and reset buttons. Core-specific libraries are loaded, Core 2-specific sketches tested, wch...serial port selected, and appropriate boards are selected, both Mac drivers are loaded.. What am I doing wrong?
    Thanks much,

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  • Do they work if you write the UIFlow firmwares to them using M5Burner?
    Are you programs actually supposed to display things on screen?

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