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Topic: Problem - Vertical Stripes (lines) in LCD Image
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Joined: Nov 11, 2009
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I have 2002 Panasonic PT-LC75 LCD Projector. I bought it new with research from this site. Green Tinted Vertical Stripes now appear on the left side of the image. In the Menu when I switch from Front to Rear or Ceiling to Desk, the stripes go away. Anyway to make them go away when in Front Ceiling projection?

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LCD Banding

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Joined: Mar 28, 2005
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Wow! I've got no good answer for you and hopefully Sheridan will pop by with a great simple fix...

But, my guess is that the video processing board has some issues, which means that you are looking at a repair.

At almost any price, the cost of repairing that projector will exceed the value of that model.

7 solid years of use makes that a dinosaur compared to the current models available and about $500-$1000 will completely replace it with a far better, brand new model.

Not as cheap as fixing the issue for free, but it's good to know it won't cost $5,000 to deal with either.
AV Integrated - Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.
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Joined: Jun 11, 2007
Posts: 1,740
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Wow, I wish I DID have a simple fix for this one. But I see not only the banding but image shifts within the banding. So this isn't a case of bands of color disappearing, the image is actually coming apart, duplicating and shifting. That points to the image processor as AVIntegrated suggested.

In most projectors, that is not an economical repair, they would replace entire Main Board Assy. However, Panasonic has the individual components and may repair the board.

At this point, you have two options...

1. Send it in to Panasonic for a repair estimate. You would have to ask them what the charges would be just to look at it and if the repair was declined.

2. Retire it and invest in a current model. Depending on what they tell you, this may be the more logical choice.
[Edited by sheridan on Nov 12, 2009 at 10:50:26 AM]
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Joined: Nov 11, 2009
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Thanks for the info... Here is the sad part of how I got here:
1. Used the Projector w/o issue for 7 years .
2. Banding/Striping issue started, on far left and only after runing for hours at first.
3. After over 3,000 hrs on a 2,000 hr lamp (seemed OK), bought a new lamp, thinking this would help.
4. Realizing the lamp was not the fix, spoke to Visual Apex Tech (should have done this before lamp) - recommended checking internal connections.
5. Carefully removed case, mainboard, cleaned and reseated connections - issue persisted.
6. Remembered the Tech mentioned some projectors have a Reset within the Menu - went through all Menu items. This is when I found that the defect only occurs when in Ceiling Mode.

So I have a Brand New Panasonic lamp (60 hrs now) in my old projector... I may try to build some kind of mount or mirror that allows me to keep it on the ceiling while in Rear or Desk mode while I decide on the replacement.
I do like your idea of seeing if Panasonic would at least give me a repair quote.
Anyway, thank you for your comments.
-Wayne
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Joined: Nov 11, 2009
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One more question, does anyone think adjusting the mirrors would help?
I only cleaned and reseated connections when I had the case open.
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