[JRTJH]

If you can access the motor and/or the wiring harness, you should see a RED, a BLUE and a YELLOW wire. The red is +12VDC and the blue/yellow wires are the motor feed to drive the motor. There is a switch at the end of those wires, but if you can't find the switch, you should be able to access the remote control unit to which they are connected. If you can find the wires, possibly you can follow them to the switch.

If you can find the wires, but can't find the switch, if you can access the remote control unit, the blue is connected to SW DOWN, the yellow is connected to SW UP, the green is ground and the red is +12VDC. You can jumper between the red and the yellow wires and drive the motor to raise the TV platform. BE CAREFUL AND DON'T CATCH YOURSELF IN THE MECHANISM.