Re: LG 50PA6500 no picture, random pixels.
Ordered a new Z-SUS board and new buffer boards which got me the same results when installed. Contacting the place I ordered the Y-SUS board from to initiate the warranty process.
Nathaniel17
Member
Last Activity: 09-05-2020, 02:17 PM
Joined: 08-06-2020
Location: Ontario
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Re: LG 50PA6500 no picture, random pixels.
I’ll have to double check the warranty on it. Sorry for the delay it’s been really rather busy last couple weeks.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Yeah, that will be the values I put in the last post.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Yeah I checked the buffers very carefully and slowly.
Checked the VSCAN and -VY with the buffer boards disconnected from the Y-SUS.
VSCAN =46-51
-VY= 47-51 but mostly 48-50
Checked them with DCV because of the inverters on the main power board (at least I think they are inverters).
If I check them with ACV I get 162V on the VSCAN and 64 on -VY but my multimeter does not like it. So I am assuming that it is not AC.
Included a picture of my multimeter so you can see what I am working with...Last edited by Nathaniel17; 08-09-2020, 03:57 PM.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
VSUS 203V
VA 55V
VSCAN all over the place
-VY 95-98V
ZBIAS 148V
VA doesn’t seem to go to YSUS board so grabbed it from the ZSUS board at where it comes in.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
I am assuming that those values need to be read with the plugged in and powered on, right?...Last edited by Nathaniel17; 08-09-2020, 01:14 PM.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Also while I was at it I got a better picture of the IC from buffer boards....Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Both board pins all read around 860-865. No shorts.
Reconnected the boards, plugged in and turned on the tv and had it do the auto gem test again. Pixels were back but they were clearly corresponding with the test. Red, then green, then blue, then white and then different patterns.
Beginning to wonder if the new YSUS board has its own issues.Last edited by Nathaniel17; 08-08-2020, 03:22 PM.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
I’m guessing bad buffer boards? Let me know what you all think.
Also reconnected the bottom board and no more pixels. The TV is definitely doing the test but not displaying anything. Can hear the different components on the X and Y boards make sounds at regular intervals.Last edited by Nathaniel17; 08-08-2020, 02:37 AM.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Reconnected the top board and disconnected the bottom board and the pixels came back. On the top half of course. Not the best picture but best I could do....Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Disconnected the top Y buffer board. Got this as result....Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Going to try disconnecting the Y buffer boards one at a time from the YSUS board to see if that makes a difference.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
This is what I got, in a dark room....Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
So... yeah I got no result. No change.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Thank you! I’ll give that a go.Leave a comment:
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Re: LG 50PA6500 no picture, random pixels.
Sorry still new to this, learning all the technical abbreviations and whatnot. Could you break that down a bit more so I can better understand it or direct me to a resource or thread that will help me understand it better? I would really appreciate the guidance.Leave a comment:
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Re: LG 50PA6500 no picture.
Here are the pictures. The pixels have gone away. TV does light up light grey for a second now before going black. Going to try hooking it back up to a video source in a bit....Leave a comment:
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LG 50PA6500 no picture, random pixels.
Hi everyone,
I have a LG plasma TV, model 50PA6500-UG that has recently stopped working. Would click when it was powered on then turn off again, had standby light working when off. Did some troubleshooting and determined that the Ysus board was no good so I replaced it.
Now all I get is random pixels going down the screen(Mostly red), menus function but do not come up on screen(can change output, change channels and adjust volume. Don’t know where the remote is, someone in the house lost it. So I am stuck with the controls on the front of the TV.
Both Ysus buffer... -
Re: New Members - please post your introductions here
Hey everyone,
From Ontario,Canada and I am just learning computers and electrical. Most my experience comes from industrial equipment (mostly mechanical). Have been looking for a good resource to help me learn and it looks like this is a good place for that. I look forward to learning from and interacting with everyone here.Leave a comment:
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