Gen 1 error message

We have 2 gen 1 brains that keep sending error messages. When we plug something into ports 10-12, it says error and to reconnect motors. We do that and the error message remains. We switch to ports 4-6 and then get an error message for those ports. Does this mean we have bad motors, or is this a problem with the brain? Thanks for your help.

You have a bad device. Plug it into port 1 right click on the brain picture and force the firmware down to that device.

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Have you tried switching wires and motors?