When you see that gray screen, are any lights on the front of the unit lit up? If not, it might be in standby mode. Try hitting the TiVo button or LiveTV button to see if it wakes up. I have no idea why it would be in standby if you did not purposely do it, but try to wake it up anyway before your reboot it. If that works, then we can try to figure out why it is going to standby.
Actually, I wish my TiVos would automatically go into standby any time no button was pushed in about 3 hours - that would prevent the unwanted emergency broadcast tests from ruining so many recordings! But I do not think that is a setup option.
Actually, I wish my TiVos would automatically go into standby any time no button was pushed in about 3 hours - that would prevent the unwanted emergency broadcast tests from ruining so many recordings! But I do not think that is a setup option.