My Pro-HD worked fine for 3 months. Now, it will power on, network light will flash several times, go solid for 30 seconds, then go off and THEN THE POWER LIGHT GOES OFF. The plug in transformer was fine - I checked it with voltmeter. Despite this, I bought another plug in power supply, and the slingbox does the same thing. Cycles on, then the power goes off completely. Any help?