Why won't my roomba 692 charge?

You can check if there is a problem with the power outlet where you have plugged your charging station. Try using a different power outlet. Also, inspect the power cable and its connection to the power inlet port on the charging base. Secure it in place firmly and then check if the charging base turns on. Another issue can be due to insufficient voltage. You can check if you have sufficient voltage at the mains. Sometimes, just turning the breaker switch on and off also does the job. For more troubleshooting tips like these, you can check out detailed Roomba troubleshooting steps here.