Fault - No signal from ROKU.
Troubleshooting - Since their is not a power light on the ROLU receiver, one does not know if it is a power cord or a receiver problem. The only way to isolate the fault is to use a voltmeter to check the output of the AC DC Adapter. The voltage output should be 12 volts. The manufacture should have a light on the receiver, to show that it is getting power. Simple solution that will isolate the problem.
David