Why won't my Roomba start when I press a green "clean" button?
Bad PC board. Throw it away. Robot vacs are nothing more than novelties ( expensive toys ) They may do what you want them to do at first but they never last very long and other than brush replacements they are not repairable. If it is within the warranty period you can get a replacement with that.
Roomba Pro Elite
The electronics have failed most likely. Not uncommon. If it is within the warranty period call the company ( good luck with that ) and they will send you a new one. These machines are not designed to be repaired other than brush replacement and filters, dust containers, etc.
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