I've had my 57831 worked on 3 times in the last 4 or 5 weeks... starting to get frustrated.
Got it June 18 2007. within a month I had the airblow blocked issue, as well as a weird brightness setting problem where when turning it on cold, it would look too bright. I have the brightness set to 20. Adjusting brightnes, or in fact anything in the video options causes it to snap back to normal look. Anyway I had just been living with the problem of the airflow blocked issue, resetting unplugging etc to get it to stay on but in January it started getting real bad. So I call the local service center and make an appointment for that problem, and mention the other issue.
Guy comes out, replaces the sensor pretty quickly, and turns it on and sees for himself the brightness glitch. He calls mits they say its a DM (digital module). He comes back a week later and replaces that part. It fixes the brightness glitch and works ok for about 2 weeks. Then the tv won't boot anymore. Plugging in the ac power and the light just blinks continuously. Holding down the menu and input didnt change the pattern. So they come out look at it say yeah your DM is bad, and order another one. 10 days later they replace it again. Works for about 15 minutes then goes all wacky looking, very red and pixellated. I call him and he comes back, he tries to download the light engine info to the DM. 1st try doesn't work but it was nearly impossible to even read the text. Tries again and the pictuire snaps back to normal. He leaves I watch it for about 10 minutes and notice a single quick flash of a single thin horizontal red line across the screen.... Never done that before so I'm thinking ok not good. Continue watching and maybe 5 minutes later it goes all red and pixellated again. Calll him back, he comes back a few hours later after finishing his other service calls. Tries the download thing again several times, no success this time. So he calls his office and they say they will DOA the DM and replace it AGAIN!
My god, how many tries is it going to take? Are these parts refurbs or what?
One thing I noticed that bothered me when the tech was here, he did the work on my front room floor and was laying these circuit boards right on the carpet.. I ask him if he wants a static wrist strap and something to sit the stuff on he tells me " Oh these boards arent static sensitive, if they were they wouldn't let us replace them in the field.." I'm thinking, anything with a integrated circuit chip can be damaged by static...
I was asking him how often the replacement parts went bad, and he said it was very rare. I'm starting to think either he is damaging these boards when installing them by not following at least a few common sense rules when dealing with computer (equivalent) parts, or there are actually multiple problems inside the set.
Anyone else have this much trouble? Or see these same problems? Next trip is their last chance to get it right, I'll be calling mitsubishi up very pissed if it breaks again.