Blue circular image on dark screen on our zenith lcd tv about 5 months after chaning halogen bulb?

Hi,

The most common indications of a weak bulb in a Sony LCD Rear Projection TV are:

• Dimimage with low brightness and contrast.
• NoPicture, Dark Screen.
• Shadowsin Image, sometimes circular.
• Intermittent Shutdown.
• Fluctuating or Flashing Brightness.
• Longerthan Normal starting time.

Also check for distortion caused by Optical Engine Failure. If any of these faults are present, bulb will not fix. Sony Optical Engine Fault Gallery

Here is a link for Identifying Sony TV Lamps.

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The tv projection lamp?How long it been inside ur tv,if it like 1 1/2 or 2 and tv been in used like 4 or 5 hours a day.The tv projection lamp life are ending and the causes.Replaced the tv projection lamp the tv should be fine.

Contrary to popular belief, any display product can have "Image Retention" and even "Burn-In". This is true for Plasma, LCD, LCOS, DLP, and CRT. I do not see a model number provided, but I would bet that you have an LCD rear projection TV rather than a DLP projection TV. If this is the case, the Blueish and Greenish blotches you are seeing on the screen are the result of UV light damage. UV light will move heavily damage the Blue panel, due it's short wave length. So, bad Blue or Green (absence or Blue) is typically the the first visual indicator of a problem. Replacing the Light Engine will resolve the problem.

optical block failure

It could be that the picture tubes have gone down on emission, there is a prcedure that can be tried to bring up the overall brightness but it is just possible that you will loose some picture quality. If it's a 1994 projo tv i am thinking of the three crt system, a gray scale alignment would probably correct the dark condition in your picture, again depending on how far gone is the emission in your picture tubes, if your projo tv is the dlp system, the bad news is that you could be needing some light engine repair. The color adjustment is possible with the availability of a service manual or in the case of the dlp system, light engine repairs or replacement are available from some on line stores.

This a Normal Intensive Use Defects, this a Screen Burnout. Sorry

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light engine will be the problem

it indicates problem on the board

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