Unfrotunately, after trying every combination of plugging in powering on and off, my Viewsonic 3250w LCD TV would not recognize my Apple TV through this switch. Hooked directly, the Apple TV and Viewsonic play well together and other non-Apple TV devices (including DVI from my MacBook Pro) operate properly through the switch.

My biggest disappointment was that there was no information at the Support portion of http://www.xtrememac.com to hint at any issues, just a pointer to this review where the lucky person happened to have a HD TV that works.

Upon searching the Apple Support Forum, I found specific reference to this switch having the dread compatibility issue. There were 2 testimonials regarding a competitor’s product (albeit with only 3 inputs and without the snazzy Apple TV footprint). The product is the OPPO HM-31 (http://www.oppodigital.com/hm31/), so I it appears to be possible to resolve this issue with the right Engineering skills for a similar price tag.

I am awaiting assistance from support at xtrememac and I am certainly hoping that they can resolve this problem without my taking my business elsewhere.

Finally, looking through a number of other forums, focused on Viewsonic as a LCD display manufacturer, there appear to be some HDMI standards focused on protecting the content owners in HDMI which if not implemented consistently may have the devices imagining that the content is being pirated and thus the lack of signal — Hurray for Copy Protection and lack of consistent implementation of Specifications.

http://www.the-gadgeteer.com/review/xtrememac_xtremehd_hdmi_switcher

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