This Electro Harmonix DRM16 vintage analog drummachine came in as non working. I tested it and found, that it got power, but instead of playing it did nothing. Checking all the components I saw, that the tempo potentiometer was pressing on the IC underneath. That IC also had corroded pins and is resonsible for the start/stop and osc. No wonder why its not running. I cleaned the IC’s, potentiometer, rotary switches and jacks. Re-flowed the socket pins. Working fine. Happy customer. Like always I share my knowledge and pictures with you.