Originally Posted by m. zillch
When you say "the screen goes black" do you mean the bulb turns off
[pitch black] or that the video signal is "black" and you can still make shadow puppets?
See if it happens with a component video connection too. It could be the HDMI handshake is having issues due to a weak signal, and possible reason for that is the connections have started to come loose or are oxidizing. Disconnecting and re-connecting the entire chain of HDMI jacks from source through switchers, and finally th pj itself, will scrape the contacts clean, and let you make sure everything is snug and well-seated while you are at it..
edit to add: I just checked the manual . At 1800 hours "Replace Lamp" will appear on screen but it will disappear if you hit any buttons. In later stages it goes off completely.
The screen went dark (no shadow puppets possible); when I switched off the DVR unit, then the screen went to blue, but it was still flashing to the point that I had to try to time the flashes in order to use the menu to check bulb hours. It was almost like the projector was cycling on and off. This concerns me because at that point I started switching inputs, yet still got the same flashing regardless of which input I chose. It also indicates that the problem doesn't seem to be cabling. Here's a response I got from Panasonic:
The first suggestion I have is to try using a shorter cable that is 8ft or shorter. HDMI cables over 8ft causes the signal to travel greater distances to unit and thins the signal to a point where it might have some gaps between the time the signal reaches the projector and when it leaves the video source. Also, check and see if the same issue happens with other devices with a shorter HDMI cable. If it only happens when using the DVR or with a cable over 8ft then it would not be an issue with the projector. If the issue only occurs with with a cable over 8ft long then you may need to consider using an HDMI extender so that you can use a shorter HDMI cable when connecting devices to the projector.
We hope this information is helpful.
Thank you for contacting Panasonic
Since I have a spare HDMI cable in the ceiling, I'll try using a different cable today if your suggestion to unplug the cables and re-plug them in doesn't work. FWIW, I am using high end HDMI cables with heavy jacketing from Blue Jean and I replaced them when I installed the new projector in Oct '09. I'm not sure I'm buying into the Panasonic response since I've had the same cabling set up for almost 3 years and while I've read about problems with super-long HDMI cables, it seems unlikely that a functioning 12' cable would present such problems. As noted above, however, I'm not sure that it's cabling causing the problem. Thanks for your response and I will report the results and further test different configurations today.
UPDATE: At this point, it appears that the HDMI cable between Directv box and PJ has failed. Backup cable worked fine, though I guess I'll have to test things a couple more days to be sure. I've also noticed that the colors with the replacement cable are much warmer than the one that was failing.Edited by bruce3404 - 8/26/12 at 2:28am