DMG Help - No power/functionality after cleaning.

Hello everyone i posted here a few months ago that my DMG was turning off / resetting when I pressed the start button. I took it apart and cleaned the battery contacts and the power switch with isopropyl. Now it wont turn on at all. If I leave the battery cover off and press/rotate the batteries when its set to on the red light comes on but there is no sound or picture. Any help on where to start the troubleshooting ?