I wonder if AppleTV is using HDCP?
Try unplugging the AppleTV, turning ON the TV, plugging in the AppleTV. That doesn't really make a lot of sense, since the AppleTV is designed to be always on, but it's worth a try.
Also, on my 37" Phillips, I had issues with the HDMI port until I installed a firmware update on the TV. Check the Hitachi web site to see if there's something new there.
Also, sometimes on my TV I have to unplug the power, then plug it back in to see and HDMI picture (not often, thankfully).
Same here with a Toshiba 50HP95.
The technical docs have the following suggestions:
- unplug and replug in the HDMI cable
- on the aTV remote press and hold Menu and simultaneously for 6 seconds to cycle the output screen resolutions from the aTV
Also, the Apple documentation states that there is no signal on component video if there is a HMDI cable plugged in - but this is not true, as you have probably already found out.
Still no solution for me, but I thought these might help you.
I'm not sure whether it was the order I started them all up in tonight, whether it was the unplugging and replugging of the HDMI cable, the multiple reboots of the TV, or the blue streak I swore yesterday, but today the HDMI signal is now being detected by the HDTV just fine.
I gave the component video cables back to the DVD player, and now everybody is playing nicely in the cabinet.
We'll see what mood they are in tomorrow.
iMac G5; PB G4; MacPro Mac OS X (10.4.9) Newton 2100; NeXT slab
on my samsung 61" DLP 1080p i am having similar issues...i unplug/replug the HDMI and the TV sees the video signal from the appleTV, then i switch to a different video source and the TV doesn't see the HDMI signal at all when i try to go back to it. basically, once i go away from that signal source i can't get the appleTV/HDMI signal back again unless i unplug/replug ..etc...any thoughts??
After months of waiting Ive just opened my apple tv tonight and it refuses to work with my Samsung 32 inch LCD at all "signal not compatible/no signal" or something to that effect! pressing the + and menu does nothing at all apart from getting a solid amber light.
Worst thing of all is that my cables are already sunk into the wall!
Looks like this dissapointing product is going to have to go back if I cant get it working!!
Can anyone help? I've tried all the measures as above apart from the firmware option which I have no idea about.
can't help, but i have the same problem with my samsung 32 inch lcd tv i bought in late 2005. the component cables work fine so i can use the apple tv, but "no signal" on the hdmi. the tv's hdmi port worked fine with my samsung dvd player. i've also tried two separate hdmi cables with the apple tv, and it still doesn't work. sorry, no idea regarding "firmware" updates.
HDMI is not working for me either.. and unfortunately, I have no component cables to test the other output with. My TV is a Sony Bravia KDL-40V2500. When I plug in the aTV I see the little "-"'s dispear at the bottom right corner, so it's sensing something.. but nothing else. Just a black screen. The status light on the aTV appears to be fine. This *****.. I have to return it now and eat the 10% restocking fee.
Sorry to hear yours isnt working. As I said, i didn't change anything apart from jiggle the TV attempting to get it off the wall (unsuccessfully) and switched it on in the morning and it worked. Needless to say this apple TV business if very weird. I would have thought HDMI is HDMI is HDMI, but clearly not.
this apple TV business if very weird. I would have
thought HDMI is HDMI is HDMI, but clearly not.
HDMI comes in several revisions (up to 1.3 now) but the problem is more than likely related to HDCP rather than HDMI. HDCP (High Definition Content Protection) is a form of DRM that requires devices to communicate their purpose digitally to content providing devices. The intent is to prevent protected HD content from being passed to devices that can record it.
For instance, if your TV has a HD output & it is connected to a HD recorder, a source device digitally connected to the TV would poll it through the digital HD connection, discover it can record HD, & refuse to output protected digital HD content to it. (Optionally, SD content may be output.)
HDCP is proactive in that unless connected devices indicate they are not recorders, or that they will not output HD content to them, digital HD output is not enabled. IOW, HDCP allows source-to-display-device protected HD transfers, but that's all.
This means that any problem anywhere in the device communication chain can shut down digital HD output, greatly complicating troubleshooting efforts. It is also why resetting or power cycling devices in different orders can mysteriously set things right.
Annoying, isn't it?