Originally Posted by FiveMillionWays
There is no screen retention on LCD.
Everything below is pasted from an archived thread. I have seen other threads like this. This is why I was always careful with my AE900. Have they fixed this since?
02-27-06, 01:15 PM
Have a Panasonic AE700, prolly 700 hours on it's second bulb (first one went out at 500...
). Anyway, it's connected via component to my Comcast HD-DVR cable box, and through VGA to my computer.
Watched a 4x3 movie last night on digital cable (Braveheart, so ~ 3 hours). When I flipped the input over to VGA for my computer (which is displaying 16x9 1280x720), I noticed the sides of the destop had a very distinct blue tint to them, right where the 'black bars' were from the movie. This is the first time I've ever seen anything like it. After about 30 minutes of PC usage, the 'bars' seemed to go away, and the screen was normal again.
However, during the PC usage, I watched a 20 minute video in Windows Media Player, but not fullscreen. After closing WMP, I noticed the same blue tinted 'box', but this time the same spot that the video was playing in. The rest of the screen, that was only displaying static images, was unaffected.
Again, this eventually went away, but it's very concerning. The blue-tinted boxes and bars were visible across all inputs, so it's gotta be something in the projector itself.
02-28-06, 09:40 AM
Be VERY careful. What people (like me) are finding out the Panny 700--LCD Burn in IS real. The idea that LCD's can't burn in is a complete myth. I ruined my 700 this way. In fact, I just got done talking to the repair shop, and he said my blue LCD panel has been permamently damaged from excessive 4:3 use. It exhibits the exact same symptoms as your projector, but the bars don't go away.
I don't know what to do now. I love my projector, and the rebate on the 900 runs through today so I'm thinking of upgrading to the 900 and just not using 4:3 mode on it. But EVERYONE BE CAREFUL--extended 4:3 mode viewing WILL RUIN your LCD projector, at least the Panny 700.
Does anyone think I could get any traction with Panasonic on this issue? I am outside of the 1-year warranty by about 4 months.
02-28-06, 10:25 AM
I used to think that LCD pannels are immune to burn-in. Not anymore. The LCD screens at the internet cafe that i'm sitting right now suffers from the same symptom. This is most allarming. Even the manual of the 900 i'm having says it. And let's say that, OK, we're not projecting 4:3 in our pj. What about 2,35:1? Those movies have large black bars. Isn't there danger of destroying the panels? What puzlles me though is why my old Sony 400qm with more than 4000 hours didn't have any problems with extensive 2.35:1 projecting...
02-28-06, 10:42 AM
Yes, I would assume that 2:35:1 is likely to eventually burn in as well. Very disturbing.
I just ordered a Panny 900 to take advantage of the $400 rebate. But my usage is going to be MUCH different with this one. No more 4:3 TV watching for me. And less usage in general to avoid the high bulb price.
02-28-06, 11:10 AM
I don't know why Panasonic projectors seem to have this. My (unreliable) memory seems to recall far more stories about Panny LCD panel problems than any other yet they use the same panels as Sanyo, Hitachi and Epson. Do they have a consistent panel cooling problem in the AE range?
02-28-06, 12:14 PM
Did a few more tests last night - What I find interesting on mine, is that it take an incredibly short time to cause these "ghost" images (seems to be only affecting the blue panel).
For instance, my background pic on my desktop is mostly greys, with two darker shapes in the middle. After leaving the PJ on the b/g image for only 10 minutes(!), I could see the two shosted shapes when I switched to another completely differen screen. Why would this be happening so fricken fast?!? How could the image be burning into the panels so quickly (if that's even possible)?
02-28-06, 12:18 PM
All of my problems were in the Blue panels as well. There was a very VERY slight darkening of the green panels that I would never have even noticed had the blue pannels not been damaged. The blue ones were the ones that were significantly darkened.