AppleTV loses video output after sitting and has to be power cycled

I have a strange problem. When I switch back to the AppleTV after having been watching regular TV or any other activity on my entertainment system, I often come back to no video from the AppleTV or it is on the resolution selection screen. If it is on the resolution selection, and I select 1080i, the sound of the startup animation happens, but no video. Either way, I have to unplug the AppleTV and let it start again to get video back. The same is when it starts up and it has no video at all.
Last night it just sat there for a long time with the Apple logo in the middle of the screen and did nothing else... I had to pull the plug to get it to restart.
Do I have a bad unit? I am using Harmony Remote, and I am wondering if it might be sending something that is confusing the AppleTV.
How safe is it to unplug it a few times a day? I can't imagine that it would be a good thing.
Windows XP Sony DGB800 Audio Receiver - Mitsubishi 65" DLP TV

No Samsung. I have a Mitsubishi 65" DLP rear projection. I would lean toward it not being the problem because sometimes I get video (just the apple logo) and nothing else and sometimes no video at all. When I get the apple logo, it won't respond to any remote stuff, even though the light is white/blue, rather than orange, indicating startup. It will sit on the apple logo indefinitely.
I have tried switching inputs on the TV when I have no video, and it still didn't help. Rebooting the AppleTV fixes the problem. I've unplugged the hdmi cable and plugged it back in and still no help.
It's just odd. It feels broken/unhappy. It's only a week old and this is the only problem so far. I love it but this one issue is really aggravating me. I'm worried about power cycling so much (at all).
I appreciate any help. Should I take it back to the Apple store and get a new one?

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AppleTV loses video output after sitting and has to be power cycled

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