Brett Boehm

Hello, I just got a second hand Casio Commando and it was working perfectly during the first week but suddenly this...

If your phone is randomly charging it probably has to do with either the power cord and the micro-usb connection. Try using a different cord to see if that fixes the issue, if not try wiggling the cord to see if that generates a response from the power cord. If none of those work look up the troubleshooting guide on how to replace the micro-usb connector as that is the likely problem.