Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Should I be testing the buffer boards? Or is this unrelated to this problem?
My screen is totally black. No grey, no half-picture.
gpaps
Member
Last Activity: 12-09-2016, 09:23 PM
Joined: 09-14-2016
Location: Quebec
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Never mind, I just pulled
Here are some photos of the back side, I don't see anything wrong, no cracked solder.
Anything else I can quickly test to see what's wrong with the board that it gets only 11v at the VZB test point?...Leave a comment:
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Trying to get the Zsus board out but how do I remove these connectors? Don't want to risk breaking them.
What are they called anyways?
Thank you...Leave a comment:
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Yes there is a flashing green light on the controller.Leave a comment:
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
OK I seem to have found them, wasn't sure that these were test points, hopefully it's the right ones. See attached photos.
On the Y-sus:
VSC: 150
Vy: -177 (normal to read negative voltage?)
On the Z-sus:
VZB: 11
Guess it's the Z-sus that has a problem? If so, any further testing or should I replace that board? Or is it an easy fix?
PS: All boards are connected....Last edited by gpaps; 09-15-2016, 07:23 AM.Leave a comment:
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
If I understand correctly, because I do have sound with both Y and Z unplugged, there is no way to know which of the two has actually gone bad?...Leave a comment:
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Ok this is the part that's a little more advanced for me, but I'll give it a shot.
The chart says Voltage Setting: 5V / Va: 55 / Vs: 201
Powered the TV, put the black probe on a ground screw, then the red probe on the VA TP point and then the VS TP point, I got pretty much the same: 55v and 200v.
Now, how do I test the power to the Y-sus and Z-sus boards? I do not seem to see any TP points on those.
Thanks...Leave a comment:
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Re: LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Thank you I am very grateful.
Yes I have a digital multimeter, I tested the fuses and got readings of 0.1 or 0.2 on them (I think one was 0.18). There seems to be one fuse on the Y-sus board, one on the Z-sus, and 3 on the power supply board and all seem fine.
Aside from that, I am not sure where else to test without causing a problem or shocking myself
Leave a comment:
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LG Plasma 60PV450: No picture but sound, even with both Y-SUS and Z-SUS unplugged
Hello all,
Newbie here, I have some basic electronic skills but far from advanced.
Fell on this site by reading about what seems many of the same problems with some Plasma TVs.
Read through a lof of very very informative posts here. But didn't find any exact solution to my problem:
My LG Plasma TV 60PV450 suddenly lost picture yesterday, although sound is fine. The screen is completely black, no subtle grey at all as I usually see when the TV first displays when powered on.
I removed the cover panel, and unplugged the Z-sus from... -
Re: New Members - please post your introductions here
Hello all, joined in after finding out a whole lot of people with the same problem as mine. Although I'm not at an engineer-level of understanding, I love to try and fix my own electronic stuff ever since I was 10.Leave a comment:
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