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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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
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.
Hard to say how much longer the lamp will last. Most lamps have a factory live expectancy of about 3,000 hours. They program the tvs with a timer that lets owners know when its close to that time. Depending on how often the set is used will affect he lamp life, if played for 5hrs a day the lamp may last longer then if its played 10hrs. When the picture gets dim or causes the set to shut down is when its time to change the lamp. If you remove the lamp and the reflector (mirror), the element has white spots or is misshapen is when they should be replaced. There is usually a lamp timer and a way to reset the counter in the menu options. Check the owners manual for instructions.
Its most likely a problem with the lamp fan / Thermak sensor or the color wheel as either one can cause the symptom youre describing. To clean the mirrors there are actually two A large one and a small one. Remove the lower speaker cover and you will notice 4 screws along the lower edge of the screen assembly, then remove the screws along the edge of the rear upper panel then lift the screen assembly slightly to disengage the clips then remove the screen assembly. The large mirror is on the rear wall of the set. The small mirror is dead center in the front where the lens projects and then the small mirror reflects the image onto the larger mirror.
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!
If the lamp light is lit, it is likely a bad lamp. If you remove the lamp from the set, you will either see shards of glass in the housing and/or a very cloudy reflector (it should look like a mirror). Be sure to use an original Sony lamp as the replacements are trouble makers. Please be sure to rate this solution. Thanks!