After one day with the DCX3400, I've experienced big problems. After getting most of the guide loaded last night, I set up about 15 series recordings and several individual recordings. Late this morning, when turned on the TV, the DVR was stuck on one channel. The Guide would not come up, the menu would not come up, the DVR listings would not come up, and I couldn't change the channel. After doing all of what I considered the normal things, turning off and on, powering off and waiting a while, hitting a lot of buttons, no change. The box would acknowledge the IR signal with a flash of light on the front panel, but would not perform any command. Actually, one thing did happen. If I pressed the info button, the parental control setup menu (with the gray screen) came up. Weird.
A call to Comcast, and they tried the usual stuff, basically sending a reset signal. That took several minutes to take. The box finally reset, and I could now change channels, but nothing else (no guide, no menu, etc.) While the CS went to ask his supervisor for help, the box reset on its own. I thought the CS did it, but he denied it. Then we went into the basic setup menu (the one acessed by turning the unit off and then pressing menu). Everything looked normal (1080i, 480i, etc.) When I pressed the menu button again, the box seemed to go totally dark, then seemed to reset. At this point, I could finally access all the menus. The CS was as in the dark about what happened, why it didn't work and why it started working again. I am just waiting to see if what happened was a one-time, new box glitch or a more serious problem.
I don't know if any of you have experienced any of this. If so, any advice? Otherwise, if it happens to you, try going to the poweroff/menu menu and then exiting, to see if that helps.