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Open the Control Panel, Power settings, Advanced Power setting, Change Sleep to Never, Hibernate to Never, set to High Performance. Shut down, unplug when not in use. Remove battery if use a lot on AC.
Check your fuses first. Then check for power at the switches, and power from the switches to the respective solenoid and motor. Most likely it's fuses. Also check where the wiring runs through the door into the car for bare spots in the wiring that might have blown the fuses.
1. Push the "Power" switch downward into the "Hold" position. 2. Press and hold the "Menu" and "Record" buttons at the same time until the device resets. 3. Push the "Power" switch upward all the way to turn it back on. OR 1. Grab a steady hold around the device. 2. Push the "Power" upward and hold it there until it powers off. 3. Power the device back on by releasing the power switch and then pushing it upward again. OR 1. Unscrew the screws on the back of the device (or simply push the lid off if it is a model without screws.) 2. Take out the batteries from the slot and wait until the screen goes black. 3. Insert the batteries the same way they were mounted and attached the lid again. 4. Push the power switch upward to turn on the device.
Is there an on off switch on the back out the computer next to the main power socket? If so move it to the on position.
Check the mains lead and make sure it is firmly inserted in the socket.
When you press the front panel on button and it doosn't boot up and there is no light indicating power, then you have a faulty switch mode power supply.
Remove the switch mode power supply and replace it with a new one with the same wattage or greater wattage.