Hello, I am visiting Toronto and can't get the TV in my borrowed apartment to work! The Digi Box (DTV 940)won't stay on. When switching the power supply on the green light on the digi box comes on for about 20 seconds but wont stay on. I have tried the power button on the remote (and just about every other button) the TV remains 'no signal'. Ive tried all of the av channels on the TV. any ideas gratefully recieved.