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Another 4.2.7 upgrade going sour...

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    Another 4.2.7 upgrade going sour...

    Hello all! New to this forum, not new to 3D printing. Have an Ender 3 Pro V1 (~3 yrs old), I have been trying for days to upgrade to - 4.2.7 board & new video controller. Having absolutely no luck. Turn on printer, BLTouch starts blinking red and doesn't stop. Press 'Auto Home', X & Y home ok, Z travels to the center of the print surface, stops and starts continuous screaming. Original video screen says 'STOPPED'. I have D/L and tried numerous firmware files all to no avail. All firmware .bin files have been renamed to 'FirmwareTMC2225' and are copied to a clean 8M SD card formatted in FAT32.
    Pending the results of this forum, I'm going to RMA the board and video controller back to Amazon and go back to the 8 bit dark ages.
    Thanx in advance for any help...
    Ski
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