I know this thread is a bit dead, but here I go. I think the sanest people here don't even have the VT50 anymore, haha.
Recently I bought a second hand 1.5 year old 55VT50E(not knowing about the defects). I come from a cheap ass 5/6 year old LG plasma, which worked perfectly throughout these years. But it was time for something better(at least picture quality wise). I am a real plasma guy, because even my cheap LG did better in colours than all of the LCD's I’ve seen.
I read reviews about the VT50 and it was the best image you could get, two years ago, since the Kuro. (paying more than 1500 for a set was a bit to much for me, that’s why I looked on the second hand sites)
Once I had the TV, I watched in THX Cinema mode (it looked to be the best image) and was blown away by the beautiful image. This TV had 3600 hours on it (I checked in the service menu)
I am not at al a nit picker(I’m not even going to let it be calibrated). But then I noticed the piss coloured blob on the right side of the screen when I was watching Google's white screen.
Of course the first good forum I found was AVS and this thread. I've almost read it all and came to the conclusion that calling Panasonic was the best idea. I contacted the service guys here in The Netherlands that take care of the warranty business and had to send pictures of the blob etc. Here in the Netherlands you get a full 2 year warranty on the sets (if i'm not wrong.) Then Panasonic had concluded they would do a full retail price refund. :PPPP Which will give me a profit of 1200 Euro's, so I'm not complaining.
My next endeavour was to buy another 55VT50 on a second hand site. I bought one from a dude who said he had a company and that I will have a one year warranty on the set. The price was 1000 Euro's. I even got a receipt from this guy, like he had a company (which wasn't so, I checked later), I also found out the TV didn't have a serial number on the back (the sticker). So I felt a bit f#cked over.
But I accepted the TV because it was for free anyway
But I found out it had a yellow blob also. But not anywhere as big and pronounced as the previous model I owned (not even half as bad). This TV had only 1600 hours on it. The guy told me it was a demo in a store (and I think I believe him, because of the low mileage and a little bit of burnt-in logo of a music channel, which is not visible from a distance).
So I thought, if I don't have a warranty on it and the TV is for free, I might just make some mods on it. I took an old fan from my computer PSU, it's a good fan for it, because it has a very low initial spinning voltage. I connected the fan to the wires of the fan on the right of the TV (when you are in front of the TV). I chose this fan, because it was also a bit whiny.
I put a pot-meter in front of both fans, drilled a hole in the back to put it there.
The sound is not that bad, it's now more the replacement of air rather than mechanical fan noise.
Before the fan installation, I put the TV's VSUS setting to HIGH and noticed a decline of the blob. It seems to appear after 20 seconds or so. But after installing the fan, I could even put the TV back to LOW and the blob almost does not appear. I even can feel with my hand the TV is almost everywhere cold to the touch (where the blob used to be). Only the lower section of the initial blob size it still feels warm. And that is also the only place the blob still appears after some time (not as pronounced as initially).
Question 1: scirica, are you still having no blob on your set?
Question 2: I've read almost the whole thread, but I noticed a decline in mentioning the VSUS pot-meter at the end of it. Is after all this time, the mod still working for you guys who have fiddled with it?
Question 3: Let's say I am to fiddle with the pot-meter to (almost) completely get rid of the blob, how much do I turn it and how. (yes I've read the thread, but I don't know what 10-4 etc means :PPP)w