Liberator21 wrote:Hi, New here. I joined this forum just to respond to this post. It's so obvious what happened here! Moose said in his third post. His daughter sprayed a liquid on the screen. The liquid ran down behind the trim, collected at the bottom, and then wicked up between the two screens. Remember capillary action???? The inner screen is a lenticular screen. Vertical ribs?? Perfect channels for liquid to climb up. How could it be a bulb or a light tunnel?? He repeated multiple times that the mark was visible when the set was off, and un plugged. The service company called it. I've seen water get in between screens before, and cause the same effect. Plus, he said squeezing the screen caused it to move like a liquid. It's drying out now, that's why it's shrinking. From the pictures however, it looks like it's leaving a stain. What you can do is remove the screen assembly, and separate the screens, clean them, and re-assemble. The screens have a double side tape holding them together, and a lens tape around the edges (according to the manual). I'll be doing a Mitsu 73" in a couple of days. If you don't feel comfortable doing a job like this, then don't do it. You don't want to break those screens. By the way, I used to do TV repair professionally, and I've done my share of RPTV sets. I've moved on to working on smaller and lighter things (My back thanks me). I still work on the occasional set though. One question, What's a light tunnel? I know what a light engine, or optical engine is, but not a light tunnel. I even looked that one up in a couple of Mitsu service manuals I have. Didn't see it.
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