Hi and welcome to Just answer.
May I know what is the model of your Keurig? Is it under warranty?
For initial answer, try to unplug your machine at least 2 hours then plug in again. In this procedure all electronic parts of your machine will reset.
Please let me know all info and results,
Thanks for your response.
Based on your description and based on my experience. That problem is cause of faulty circuit board that need to replace. I just found the replacement board on ebay for only $10. CLICK HERE to view the direct link.
For disassemble guide follow the instruction HERE.
Please note: To replace the board make it sure you connect the correct wire and connectors. Just remove and install it one by one.
Hope this information will be helpful.
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I'm just following up with you to see how everything is going. Did my answer help?
Let me know,Chester