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Old 07-12-2016, 02:31 PM - Thread Starter
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Plasma has spots...

My 58" Panasonic plasma TV (TH-58PE75U). Bought it from Costco many years ago. Recently it started to develop spots. I originally thought my teens splashed something on the screen but these are inside and not able to be cleaned from the exterior. The spots are there with or without power and they seem to be multiplying. Any ideas?
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Old 07-12-2016, 02:40 PM
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Assuming this is below the surface of the glass and not simply a spill: looks like a seperation between the outer glass and the substrate. They are simply glued together so it's possible that with enough age and heat that they are simply coming apart.

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Old 07-12-2016, 02:59 PM - Thread Starter
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Quote:
Originally Posted by sage11x View Post
Assuming this is below the surface of the glass and not simply a spill: looks like a seperation between the outer glass and the substrate. They are simply glued together so it's possible that with enough age and heat that they are simply coming apart.
Assuming they are separating what should I expect moving forward? The picture is still very good at this point with just the annoying spots. The TV is old and not really worth anything but is this repairable, maybe DIY?
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Old 07-12-2016, 06:34 PM
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You sure it's on the inside, and not between the AR filter and the outer glass? And nobody cleaned the screen with any kind of windex or anything? Cause it kinda looks like what happens when Windex attacks the AR Filter but it's hard to tell from the pics.

It's also possible that and internal coating or the black filter on the panel is starting to de-laminate.

If you're handy, you could remove the front bezel and remove the outer glass and see if it's actually on the panel, or if it's in the outer glass.

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Old 07-13-2016, 04:09 PM
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I agree with Randy. That looks like the A/R filter is starting to come off the glass, causing air gaps and what you are seeing.
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Old 07-13-2016, 06:36 PM
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The bubbling effect in those pictures reminds me of when you see older cars with tinted windows where the film is starting to de-laminate from the glass, probably due to heat over time.

Plasma panels all have a black filter applied to the face of the panel which helps give the TV darker black levels, and it's basically like window tint film. Maybe the heat of the panel over time is causing the film to separate from the glass, but if that were a thing i think we would have seen other posts about it. I hope this is just an abberation....




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Old Yesterday, 01:25 PM - Thread Starter
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Guys, thanks for the input. I can't say for certain in which layer the problem is but it sure doesn't appear to be on the outside. I started to disassemble the entire unit the other day but there are several screw I can't get to. Don't know how they put them in. I have teenagers so anything cleaning or solvent wise is a possibility. I hate to give up on it because it's been a great TV and we still enjoy the nice picture but I don't think repairing it makes sense. Was hoping for a DIY fix that but might just be an excuse to look at a bigger screen.
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Old Today, 07:21 AM
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Quote:
Originally Posted by southerntester View Post
Guys, thanks for the input. I can't say for certain in which layer the problem is but it sure doesn't appear to be on the outside. I started to disassemble the entire unit the other day but there are several screw I can't get to. Don't know how they put them in. I have teenagers so anything cleaning or solvent wise is a possibility. I hate to give up on it because it's been a great TV and we still enjoy the nice picture but I don't think repairing it makes sense. Was hoping for a DIY fix that but might just be an excuse to look at a bigger screen.
I'd still remove the outer glass then check the plasma panel to see if the de-lamination is indeed between the panel face and the black filter that's applied to it, or if it's present on the outer glass itself. It is probably one or the other, unless it's actually inside the plasma panel itself.

IIRC, the TH-58PE75U was the Costco version of a TH-58PX60U (a special run of 58 inchers for Costco to use up Panasonic's leftover surplus inventory of 58" panel modules from 2006).

The outer glass is removable and replaceable, so if you can find instructions online for removing the front bezel or front cabinet section of a TH-58PX60U that may reveal how to get to those screws, or some trick to remove the outer glass.

.

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