** We only have the one mBot, but I found a compatible cable and still get the same error.
Once still the same issue on this mBot even with another cable or same cable which has been verified okay with another mBot, there should be some issue on the mCore board. Please refer to this document to test if the mCore board is okay.Test if the Arduino board is working or not with the Blink program.zip (699.0 KB)
As for the remote control, here I also attach an instruction which guide test if the IR remote controller is okay with an Android mobile device.8. How to judge if my IR remote controller is ok.docx.zip (10.7 KB)
At last here is an post listing all the FAQs for mBot to you for reference.