I hooked up a Comcast Digital Box for a priest friend in a nursing home. All works fine except the front display on the box is blank except for the green power light. What am I doing wrong? I forgot to look what type box he has other than it is silver with a front LCD display.Thanks.

Jim

1) make/model of box makes it easier to help. You can usually find setup/user manuals online.
2) have you called Comcast for assistance?

I believe that you need to call in to activate it for the first time usage.

Check the quick start installation instructions.