Re: Another LG 50PG20 power up with sound but no picture
I replaced the ysus board, and I have a picture again. Thank you very much for helping me learn.
Does the old board have any value?
freavulv
Member
Last Activity: 03-26-2015, 09:02 AM
Joined: 01-14-2015
Location: Lincoln NE
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Re: Another LG 50PG20 power up with sound but no picture
I didn't see any obvious bad joints but they could be under the foam insulation.
I have baked (350* for 8 min) printer processor boards to fix cold solder joints, would that work here? Or would it be better to order as new one. Searspartsdirect was about 130$...Leave a comment:
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Re: Another LG 50PG20 power up with sound but no picture
Found it. Checked it. TV turned on, it bounced around a bit, then startled on about 0.7 volts. It was never 190.
Replace the Ysus board?...Leave a comment:
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Re: Another LG 50PG20 power up with sound but no picture
I can't find any shorts on the buffer boards. My boards are slightly different than the one in the training manual, but doing the diode test results in similar results. Open with the black on the ground, small voltage readings with the red on the ground.
I don't know what VSCH is referenced above, it doesn't appear in the service manual. I checked the fuses on the ysus and they were good.
I'm at a loss here.Leave a comment:
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Re: Another LG 50PG20 power up with sound but no picture
Watched a couple you tube videos, I tested the buffer board, from the ground pins to the ribbon cable pins, and there were no shorts.
I think I found the training manual, I will get back to the TV tomorrow.Leave a comment:
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Re: Another LG 50PG20 power up with sound but no picture
How? I checked the+5v terminal to the ground terminal, in the picture above, and it read open. On both upper and lower boards.
that I will have to check
I did that, and still nothing on the screen at all...Leave a comment:
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Re: Another LG 50PG20 power up with sound but no picture
I double checked the connection but didn't see any change. Any other ideas?Leave a comment:
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Re: Another LG 50PG20 power up with sound but no picture
Thanks for the quick reply. I have reset all the cables.
The TV goes to black after about 1 second of the screen as shown. (it took me 3 attempts to get that picture) I'll read through that thread tonight, and stop again in the morning.Leave a comment:
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Another LG 50PG20 power up with sound but no picture
google continues to lead me here, and I've read through the similar threads I can find. So I join, and rather than hijack someone's thread I thought I should start my own.
This is my boss' TV. (I'm the maint super, pretty good with my hands, but electronics are a little outside my norm.)
TV worked, he moved it to a new location, (upside down in the back seat of his car, if I understand correctly. Now it doesn't work. I was hoping it was something as simple as a loose connection. I checked them and found no loose ones.
It powers up fine (with both remote... -
Re: New Members - please post your introductions here
Greetings, I'm trying to save my boss money and fix his plasma TV. I work maintenance, and am pretty good at tearing washers, dryers and other appliance apart and putting them together...
Got the cover off the TV, and its a little more finicky looking...Leave a comment:
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