Well, my HDVR3500 died yesterday. It no longer boots, the red LED comes on, but nothing else. All l I get is a humming/buzzing noise and no picture. Tried unplugging and letting it sit for a while, also tried the manual reload of the firmware using the front panel buttons, no luck Resurrected my old Viewsat Platinum Ultra Lite until I can find a replacement... no HD, but at least I have a few good channels...
Is it the latest firmware in it? It may be the screen blanking issue, if it is the latest firmware installed. Should be able to telnet into it and bring it back, if it's that issue.