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Search for SetupPOS. You can also find this program in the StartMenu under Epson. NOTE: you must be an administrator to run this program. A regular user will not be able to run the troubleshooting utilities.
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Run the setup utility. At the UAC message, click yes.
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Follow the thick black cable of the pin pad to the fan-out hub (about 2 feet away).
At the fan-out hub, disconnect the small black power cable (the L shaped barrel connector labelled PWR in this diagram).
Make sure the right pin pad is turned off; the screen should be completely black.
Wait for 10 seconds (very important).
Then, plug the power connector back in.
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