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Just replaced projection bulb on my hitatchi lcd tv model55vf820 and in have blue spots all over screen

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Blue spots mean Bad light engine Call these 2 companys for Parts Encompass Parts Distr. 1-800-638-3328 and UED 1-800-648-6657 you can also visit their websites and try E-Bay under Electronics & Parts for TVs. Ok Encompass Has 2 Price is 857.00 and 50.00 off for your old one But try other companys you might find one cheapeer on E-Bay or UED! Part # UX25302 Optical Engine assy.

Posted on Nov 16, 2009

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Defective Light Engine, very costly.

Posted on Nov 16, 2009

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My Hitachi 60VG825 projection TV is 3 years old. For the past several months the screen has been turning blue around the outer edges & this past week a large yellowish green spot the size of a...


Sounds like Calibration is needed on the projection internals. Your TV uses a rear-projection system and the problem is either in the imaging LCD Unit or the light filter. I see in a previous thread you have changed the bulb. You can invest in a voltage regulator to keep the hardware in factory condition.
Also you can burn a DVD of a stuck pixel remedy video and run it on the screen with full brightness and full contrast. This is used for plasma burns and stuck pixels on conventional Flat panel TVs but can repair color issues with projection systems. This therapy is focused on the imaging unit between the projector and the main drop of your tv.
please feel free to post a more in-depth description or any changes

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1 Answer

Hitatchi 52" rear projection TV has blue spot in middle of screen


Hello :
I suggest u retrace you the steps u took to replace your lamp make sure no foriegn objects got on the prism where the light shines throung the optics engine, if you remove the lamp compartment througly. If you had a perfect picture prior to replacing the lamp, then retracing your steps you might find something that does not belone. One final note: Did you purchase the right lamp 120watts anything higher than this wattage could damage your optics engine. I suggest never vacuuming the compartment because particals fly around from the suction and could get on the glass of the color wheel asembly.

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1 Answer

Blue spot on screen center. Peoples faces and show blue tint


if you have a Sony LCD projection ..Theres good chance optical block needs replacing .This spot will get bigger and will eventually cover most of screen the longer you use it .needs repair.If there is no warranty on this unit..I would estimate repair around 6- 8 hundred dollars ..

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1 Answer

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The EEPROM needs to be reprogrammed. You should contact Panasonic customer care as they may fix this at no charge to you.

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1 Answer

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sounds like your optical block lenses has melted due to heat.
( common problem) here is the light engine/optical block number

A-1084-658-A

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3 Answers

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This is probably the polarizing filter. It will need to be replaced. It should not cost very much to fix.

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2 Answers

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Bad Light Engine Call UED for rebulit one 1-800-648-6657 They are not cheap.

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1 Answer

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Sony guarantee the consumer to replace the optical block assembly for thousands of dollars in parts and labor every four years or when the pink and blue spots appear every time. Then replace the optical block assembly again and again every time the spots appear.

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1 Answer

Blue spot


the model number KP-51WS510 deosnt use a bulb or lamp. and touching the face of the lamp will not cause color problems in the picture. if your tv is an LCD projection then i would suspect the optical engine as the culprit. to check when you turn the tv off do you still see the blue distortion? if so then you have a bad optical engine.......as long as it is an LCD projection.

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