Firmware upgrade "invalid reply checksum"

QozQoz UCSD
in Cyton

Hello,

Before I get accused of not searching the forums, I have read a lot of posts related to this topic and my situation doesn't seem to fit any of them.

I have 2 Cytons I'm upgrading for students. I went through the correct steps of updating the radio firmware on the dongle/board for both Cytons (after many frustrating hours). Both Cytons are able to connect to the OpenBCI GUI and pick up signals. However, when I try to update the board firmware using 'DefaultBoard', it only works on one of the Cytons. The other one consistently throws out "invalid reply checksum." I've tested this on 4 computers now and I know the installations all work because I can validate the procedures on one of the boards.

Any ideas why this might be happening? I've tried probing it via the Cyton Board SDK commands and the outputs appear to be identical on both boards.

Thank you in advance.

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