Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
That's good advice. Thanks for the tip. I did always love the plasma over the LED LCD picture quality. It's a shame Plasma got killed off. I always wanted one of the Kuro sets. The only thing I do like about the LED-LCD is the weight. My two plasmas are around 90-100 pounds each. I took my old main board to work today and checked the surface mount caps with a cap checker. They all tested so I'm not sure how much more time I'll put into fixing the old board when I can buy a working one for 80 bucks. Just thought I'd give...
traderx
Member
Last Activity: 10-31-2013, 07:03 PM
Joined: 10-10-2012
Location: FL
-
Re: Bought a Proscan 55LC55S240V69
[url]https://www.badcaps.net/forum/showthread.php?t=17613&page=4[/url]
quick glance... see post #62 onward.
or this thread:
[url]https://www.badcaps.net/forum/showthread.php?t=25679[/url]
they suggest taking a look at C857Re: Bought a Proscan 55LC55S240V69<b...?t=25679[/url]...Last edited by traderx; 10-24-2013, 10:32 PM.Leave a comment:
-
Re: 2008/9 Samsung LN55A950 Displaying Horizontal Lines
I would never pay to have a capacitor replaced. It is just about the most basic soldering job you can do and a good place to start.
I have no experience with this exact model of TV, but I have had a history of replacing failed SAMYOUNG caps out of other products, especially the 1,000uf range. The bottom one that appears puffed, while it may not have failed completely, is the usual sign that I'd replace it. That said, It might be a stretch to assume that is causing your issue and if I was replacing one, I would...Last edited by traderx; 10-24-2013, 10:23 PM.Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
Well the new board arrived today, turned out they shipped it priority mail which is awesome. Just installed it. Seems to work fine, I'm in the process of testing all of the inputs, LAN connection, etc. Here are some Photos. There are no more green sparkles in the blacks, but now there are blue sparkles in the red areas if you are a few inches from the screen. Still it's a 100% improvement over the trippy blue dot mess I had in the beginning of this post. As you can see the blacks are very deep black and colors are vibrant....Last edited by traderx; 10-23-2013, 11:37 PM.Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
Tom, the green dots are no longer visible at all now that this blue dot problem has surfaced so I can't test for that by adjusting the brightness. I can't get enough working black area of the screen to be able to test for that. When I ran the control board test patterns, however, there were no green dots or any color dots of any kind in the black charts. They were pure black. I would presume that running the panel at 50% brightness would be in a safe range without overdriving components. Perhaps this main board had a...Last edited by traderx; 10-22-2013, 03:49 AM.Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
Good evening Tom, thanks for your reply, here is a snapshot of the current video settings for brightness/contrast etc. This is the setting I've been using since I got the TV new. Looks like contrast is 70, brightness at 50. I tried lowering the brightness and contrast. It made no difference where I set those settings. There was a subtle change in brightness/contrast but the array of blue dots was still burning strong. At this point I'm awaiting delivery of the new main board from CA. Should take a week unfortunately with...Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
I had to run out, but will update you with that test when I get back to the TV this evening. I believe I kept the video setting on the THX certified calibration setting.Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
That is correct Sir, the black was deep deep black with no moving green sparkles in it. Never seen it that black. White was clean white, color charts and sweep test patterns were all clean. RED was pure red, not pink. I'm ordering board # EBT60722601. I hope it's in working condition. Thanks for all of your help....Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
So I just removed the LVDS cable between the logic board and the input board. I then jumped pin 1 and 2 on the logic board "AUTOGEN" and powered it up. The screen ran through it's sequence of test patterns and color charts/greyscale sweeps. Everything looked beautiful. I've never seen blacks so deep on this display and whites so crisp. Green and Red were flawless too. I let it loop 3 times. I never saw any issue with it. So at this point the logic board is OK and I need a new main board? Or do I have that wrong....Last edited by traderx; 10-21-2013, 12:09 AM.Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
And now for the guts: I located the logic board. Everything is nice and planted, cables are held in place with yellow tape. I reseated the cables and what I believed to be the LVDS cable, basically any cable that wasn't taped down. I powered up the panel and it gave me the same results. So now I'm uploading the photos and will wait for further tips. I might just try to locate that logic board online and purchase one. Let me know if I should be checking something else. I see that I can short pin 1 and 2 on "AUTOGEN"...Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
So here are some photos of the TV as requested. First grouping shows the current issue....Leave a comment:
-
Re: LG 50PS80 plasma: Moving rows/array of blue dots in black
Tom, thank you for the very quick reply. I appreciate it. I am at work for the remainder of the day, EST zone (I see you are UK) just wanted to get the thread started. I will pull the back off and get photos posted tomorrow. When the TV was brand new it had moving green sparkles in the blacks on the entire screen, but this was only visible when you were a few inches from the TV. Today the whole screen, with no input areas that should be black, were just covered with bright blue lines. I'll get more pictures up as soon...Leave a comment:
-
LG 50PS80 plasma: Moving rows/array of blue dots in black
My LG 50PS80 plasma, which is around 3 or 4 years old, has developed an issue. I was watching TV last night and noticed these cool bright blue dots in the black scenes on the screen and thought it was part of the show I was watching. It wasn't until the screen went full black that I saw this (see attached pic please) These blue lines are made up of little blue dots and the entire array of lines/dots is moving left and right all in succession. It's sort of bouncing left and right on the screen a few inches. I left the TV off overnight and this afternoon turned it on to find many more lines. The...Last edited by traderx; 10-20-2013, 03:48 PM. -
Re: A guide to fixing/troubleshooting some common plasma TV problems
Whoops...I'll go ahead and make a new thread on this:
My LG 50PS80 plasma, which is around 3 or 4 years old, has developed an issue. I was watching TV last night and noticed these cool bright blue dots in the black scenes on the screen and thought it was part of the show I was watching. It wasn't until the screen went full black that I saw this (see attached pic please) These blue lines are made up of little blue dots and the entire array of lines/dots is moving left and right all in succession. It's...Leave a comment:
No activity results to display
Leave a comment: