AppleTv HDMI output

In trying to achieve the 'nirvana' of home theatre for all things audio and video, I have added to my setup a Mac Mini (again) as well as the currently installed ATV.
I have AppleTV (which I love) but wanted internet and HD quicktime plus Skype etc so decided to run both Mac Mini and AppleTV to my LCD TV.
Unfortunately my TV only has one HDMI input. So, easy I thought, just run an HDMI switch. Well I've tried 2 (not cheap ones) and the ATV will not work unless directly connected to the TV or only one input into the switch / hub. Mac mini seems to work fine through the switch / hub.
Anyone had experience of this or why it will not work?
And why o why is there no power switch on the back of the ATV!??!?!?!??!

Anyone had experience of this or why it will not work?
HDMI complaints are one of the most common as far as the ATV goes, so I'd say that HDMI is just not very well implemented on it. I have six HDMI devices connected to my TV via an Onkyo A/V amp, and it's always only the ATV that has HDMI glitches. That was also the case when I had it connected via a Hori switch, as well as directly to the TV before that.
You might try fiddling with the HDMI and TV resolution settings on the ATV and see if you can find a combination that works for your switch.

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