Hello. My name is Michael. I can help you with your question.
The first thing I would suggest trying is unplugging each of the alarms to reset them. If this has no effect, please let me know and we can try some additional troubleshooting steps from there. If you are running it from the optional C batteries, then you should replace the batteries. If you are running it from the AC adapter, it is possible that the AC adapter has failed and needs to be replaced. For this you can use a universal adapter, or we can look for one specifically for this radio.