I recently changed the lamp on my TV, removed the display screen and cleaned the reflector mirror. I had some issues with the lamp insert and the receiving plug had to be retreived from the back of the TV. All went back together fine and the TV looks great.
However, now my TV will not tun off, either with the remote or via the front panel button, but it turns on with both. I even took off the display screen again and checked the wiring harness and front panel processor board, and all look OK.
After the above issues I had to disconnect my cable convertor box and change that out. When disconnected, the TV turned off as it should. I recently replaced that convertor box and am now having the same issues.
I have had the same configuration for 2 1/2 years with no problem until now.
Wow.. How is the TV plugged in? I had someone with a Samsung DLP do this but hers was plugged into the cable box that was plugged into the surround sound receiver which was plugged into a back up which was finally plugged into the wall. Feedback caused an electrical feedback causing really really odd tendencies.
Second, that connetion between panel and set has a row if pins make sure the second one is not bent because it could be on permanently or causing it to have a constant connection . It is so hard to explain this hope this helps.
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Check your drum. if drum is ok clean the laser unit and clean the drum unit and chraging roller.
And clean the laser scanner lamp and the Mirror.
You must alert while cleaning the mirrors(Reflectors) don't use thinner, alcohol and stain removers for cleaning scanner lamp and mirror don't do that to movements the reflectors just open the copy board glass and clean with a cotton.
projection tvs can display white dots from the dust that is on the reflector mirror your lamp shines the picture on before it is reflected onto the front screen of your tv, one must be very careful when cleaning this, may be worth a service man doing it for you
Shannon, cleaning the mirror or the lens will only drgrade the picture that's reflected onto the screen. A dark picture is most likely caused by the ~300 watt lamp aging and now needs replacement. You can confirm this for yourself by removing the lamp from behind the right hand speaker door and looking at the bulb-shape at the inside, bottom of the reflector. The bulb should be clear, with maybe a small white patch on the top of the inside of the electrod chamber. If it's a large white patch, or the chamber has any black, or even worse has a deformed chamber, the lamp only needs to be replaced.
I did the longevity testing for the 65" TV's. No other component caused the TV to 'darken' as you state....
Clean the small front projection mirror. That mirror can get dust on it and will cause the projected image to appear dull and dim and cleaning that mirror will usually restore the brightness and crisp details in the image.
I had the same problem on my 50" DLP. Today I took the light projection mechanism apart to get to the
mirror tunnel (a piece about 1.5" long located between the projection bulb
housing and lens housing) and, for now at least, the shadow problem has
been corrected on my TV.
It would be difficult to describe in detail without photos of how to
remove the mirror tunnel. Briefly, once the lower rear cover is removed, it
involves completely removing the entire assembly of the projection bulb and lens,
along with disconnecting 3 or 4 cable connections. This assembly is held in place with 3 large screws around the projection lens housing in the lower center of the TV. After it's completely removed from the TV, removing smaller screws will break down the component parts. Once you locate the color wheel (about 2" in dia.) between the bulb and lens, the mirror tunnel is directly adjacent to it.
Handle it all with care, and I strongly suggest that you immediately cover the protruding projection lens will a lens cleaner cloth (held by rubber band) so it doesn't get scratched or smudged while you're working on the assembly. This will all make more sense after you get into it. Just remember where everything
goes, both cables and screws!
My four mirrors had indeed shifted into a flatter parallelogram than it
should be. On my set the metal tunnel casing is molded so
that it doesn't allow for the mirrors to be in the shape of a rectangle;
it requires a parallelogram shape. The mis-shapened tunnel caused a small
portion of the metal mirror housing (on the lamp end) to protrude into the interior of the
tunnel, hence the shadow on the screen.
To re-shape the mirrors I gently inserted a nylon cable tie--with a
sharpened leading edge--into the tiny gap behind the mirror that had
shifted. In doing so the mirrors shifted back to the proper positions and stayed
there when I removed the cable tie. (Be very gentle with the mirrors and do not insert anything into the tunnel!)
It's not clear why this (now restored and larger) gap behind that one
mirror even exists, but to ensure the the mirrors don't shift again, I
inserted and left in a length of cable tie (which is near perfect in
thickness and width) in the gap. Time will tell whether heat will deform
Perhaps a similar-size strip of metal would be better but I didn't
have one. And I would not use any kind of glue or adhesive on these mirrors (as others have suggested); with their small size and the need to keep them crystal clear there is just too much potential to royally mess them up.
After putting it all back together and testing, the shadow is gone. Hope
this helps and works for others!
You should re-consider having a tech do that for you. The access is by removing the screen assmbly which are somewhat fragile. If you want to give it a try, pull the speaker grill off, it comes off just from pulling it, there should be five screws across the bottom of the screen assy, remove those, there is also an access door on the front of the set with four screws, that has to be removed to unplug the cable that goes to the screen sensors. The screen assy has to be lifted straight up an inch or two and then you can pull it forward away from the set.
As far as cleaning the mirror and lenses, you can't get to the face of the tubes so it's the top of the lenses that you clean, just use a soft lint free cloth (cloth baby diaper) and wipe the dust off the lenses, you can slightly dampen the cloth with water if necessary, same type of cloth on the mirror and you can use a glass cleaner on it just don't press too hard on the mirror.
as i previously posted, my picture was dim, muddy looking after
replacing lamp with osram lamp. i fixed mine by taking the screen off
and cleaning the small mirror. it had a thick layer of dust on it,
cleaned with a microfiber cloth. no water, no glass cleaners. i also
used a very fine new small paint brush and dusted the projector lens
which also had a dust film. brightness, contrast and clarity returned!
How long has it been since you last changed the lamp and did you use an original Sony Lamp? It sounds like the lamp is going bad.Pull it out and examine the reflector. If it is all cloudy, it is time to replace the lamp. The reflector on the new lamp will be shiny like a mirror. Please be sure to rate this solution. Thanks!
It is likely the projection lamp is weak, causing the picture to cycle on and off. Take the lamp out and examine the reflector. If it is dull and cloudy, it's time to replace the lamp. A new lamp will have a reflector that is shiny and looks like a mirror. Be sure to rate this solution. Thanks!