Question about JVC HD-61G787 61" Television

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My screen has shadow spots that look to be on the inside of the

Screen.Is this being projected on the screen or burnt there.Can i clean something or is it permanent.

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You may be able to clean the lenses but if that dosent work it usually means its there for good

Posted on Jan 02, 2009

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TOSHIBA 57LX177 SHADOW SPOT CENTER OF SCREEN


If my research is correct you recently replaced the lamp and then the "shadow spot center of screen" appeared.

Three possible reasons I can think of for this:

Something wrong with new lamp or on face of lamp--never touch the face of a lamp as oil from you hand can leave a residue and damage the lamp or cause a image issue.

Something inside on the optical lens or even the mirror causing this--not likely but possible.

A defect in the optical light engine in the set---usually if heat which comes from the lamp damages the engine it will be a color and not black---engine has a series of lens and baffles inside that heat can damage--causes minute separation inside of the lens etc.

If the old lamp works at all try putting it back to see if same issue--did you replace just the "bulb" in the housing or the whole cartridge?

If remove new lamp look at it and where it faces--usually a clear lens faces it and if some dirt on that..........

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You have to take front projection screen off of tv. When you have taken screen off, turn on tv and observe light coming from the three crts. Look into the face of each crt and you will notice some contamination inside face of one of the crts. Most crts are sealed, so youll have to replace the burnt crt causing spot on picture.

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turning off the main can be very harmful to rear projectors if you dont wait for the cooling off period, for instance when you turn off the tv from the remote, the fans inside are still on in order to dissipate the heat given out by the lamp. as a result some of the lens inside the engine may have burns-in caused by excess of heat.thus leading to shadows on the screen.

hope this helps

please rate me!

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There are many causes for spots on top of an LCD rear projection tv, you are probably in the first two cases, both require part replacements and repair job.

If the spots are faint blue, green or pink shadows, then it can be a problem with the anti polarization panel placed on top of the LCD.

Similar spots (colored shadows) may be caused by a problem with the light engine, in that case the fix will be expensive.

If the spots are bright lights, like an aura, that is a problem with the color wheel.

Problems on the light tunnel can cause static gray shadows.

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Hope Ya Fix It!

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Sound like you light engine is going bad. A major problem to fix! Especially if you are sure it is a dlp

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Is this a DLP or a conventional 3 tube projection tv?

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