Apple TV blinks intermittently when I change HDTV source/mode - forced to reboot ATV

Olevia problem, probably

I almost hate to say this, but I think it's a problem with certain revisions of the Olevia TV's firmware. This has happened with my Olevia TV, too, and rather than reboot, another way to rectify the problem when it occurs is to momentarily unplug one end of the HDMI cable, and when you plug it back in a few seconds later, the AppleTV will re-negotiate with the Olevia and the picture will stabilize as it should.

Several months ago, I discussed this at length with an Olevia support person, and the company position seems to be that the AppleTV doesn't follow the HDMI "rules" properly. While unlikely, I suppose that it *is* possible.

My experience, indeed, was that the problem (usually) only occured when the AppleTV had entered screen-saver mode by the time it was switched back in, which makes me think that the AppleTV itself might be doing something wonky as regards to the HDMI spec.

Interestingly, this doesn't happen with my later-model Olevia and the same AppleTV unit. YMMV.

A similar thing happens with my Samsung LCD. Very frustrating.

Another Oleavia 32 inch LCD HDTV owner here. I experienced the same things including garbled video from YouTube and iTunes via HDMI, but not over component. Since I updated my aTV with the latest FW, however, I had not have any problems.

Mine did this all the time as well, when I would switch the receiver from one source to the TV, the screen would just show an Apple logo and be completely unresponsive. Since the last software update, it now still shows the logo for about 5 seconds, then goes to the menu screen. Not sure if this is the exact thing you are getting, but sounds close.

iowamensan said:

Mine did this all the time as well, when I would switch the receiver from one source to the TV, the screen would just show an Apple logo and be completely unresponsive. Since the last software update, it now still shows the logo for about 5 seconds, then goes to the menu screen. Not sure if this is the exact thing you are getting, but sounds close.

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Another +1 on this. It's worst if I switch the (Panasonic) LCD TV off and on again. The Apple logo appears for a millisecond, then the screen goes blank, then I have to wait up to 5 minutes for the ATV to appear. Very frustrating.

It's also part of why the removal of the option to hold down Play to switch off the ATV is a massive annoyance to me. I have to go through the wait to see the ATV to switch it off. And when I switch the LCD on when the ATV has been in Standby, it takes even longer to appear on the TV.

I have the same exact problem. I have a panasonic pz85. Seems to be an hdmi handshake problem

aphxtwinin said:

I have the same exact problem. I have a panasonic pz85. Seems to be an hdmi handshake problem

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Anyone made any progress with this? It's very frustrating. I'm reluctant to chop and change from watching AppleTV content to changing my HDMI input on TV to watch CableTV.

Reason is the AppleTV seems to have a 50% chance of ever reappearing on my TV when I switch sources back. Sometimes it comes back eventually, other times it just never reappears. I am forced to pull the plug on the ATV in this case, switching the TV on/off has no effect.

The TV is detecting 720p input, the Apple TV is switched on. But it just hangs. Some sort of 'HDMI Handshake problem' sounds very plausible. How to fix? Do I have to Standby the AppleTV every time I want to change TV source?

Apple's implementation of HDMI on TV is a bit below expectations. This has been documented repeatedly in forums such as this one (I've also heard that running an AppleTV through an HDMI repeater - such as a receiver - can make matters even worse).

My suggestion: Use component video cables. Sure...The A/V industry loves to sell us expensive best-of-the-best cables, but, c'mon, we're working with highly compressed video here. You wouldn't plug high-end headphones into your iPod, would you? Component video will solve the problem you speak of with very little - if any - hit to video quality (though, admittedly, running four wires - component video + optical audio - is far less attractive than a single HDMI cable).

Here's to improved HDMI performance on the next hardware revision!

Nathan

same thing with 2009 mac mini

I am having this same issue with my 2009 mac mini. I switch to cable tv, and when I come back to the mac mini input it just blink/rotates through a black, blue, and desktop screen over and over again.

same thing happens if i try and use PIP. I have a Dell 37" LCD TV.

has anyone found a solution?

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I get this on my AppleTV / Sony Grand Wega setup downstairs because I have to go through a dumb HDMI switch (yay for single HDMI in!).

I'm sure it's to do with the handshake that's required for HDMI devices going through a passive (dumb) switch.

My AppleTV / LG LCD (much newer TV) setup upstairs doesn't have this problem at all.

When I switch to the 2nd HDMI input, I actually get a "Negotiating..." prompt on screen as the LG reconnects with the device fresh each time.

I'm guessing some TVs have low quality passive switches inside that (like my add-on switch) doesn't really handle a fresh handshake each time you switch inputs??

RumMunkey said:

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I'm sure it's to do with the handshake that's required for HDMI devices going through a passive (dumb) switch.

I'm guessing some TVs have low quality passive switches inside that (like my add-on switch) doesn't really handle a fresh handshake each time you switch inputs??

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my guess is you are probably right. I had read somewhere else that it might be with the EDID, which I think is what you are talking about. so the next question is, should I try a different connection.

I can purchase monoprice's mini-displayport to hdmi and see if that fixes it. i can purchase their mini-dvi to hdmi and see if theirs works better (some people reviewed that it was the only adapter that worked for them) or I can try a VGA connection to my tv, although its unfortunate to be downgrading like that.

--or I can purchase the Gefen DVI Detective which stores the EDID information, but that would be yet another $65 and another thing plugged into my mini.