Hi everyone got a 50" lg plasma here which powers up but no picture i have sound ive checked all boltages coming from psu and they seem fine. On the zsus the 18v is only measuring 3 volts and same with ysus disconnected the board is eax65335001 can anyone help narrow down where the 18v has gone thanks
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Re: Lg 50" plasma no picture but sound
Is there any plasma experts online -
Re: Lg 50" plasma no picture but sound
Take a picture of the y-sustain please.Comment
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Re: Lg 50" plasma no picture but sound
Probably shorted Ipm but we need images.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: Lg 50" plasma no picture but sound
All the voltages are fine going from psu to zsus but the power cable that connects the ysus the 18v is only goving me 3v with or without the ysus plugged inAttached FilesComment
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Re: Lg 50" plasma no picture but sound
This is zsusAttached FilesComment
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Re: Lg 50" plasma no picture but sound
This is ysusAttached FilesComment
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Re: Lg 50" plasma no picture but sound
I bought brand new zsus as thats the board i wasnt getting the 18v from but new board is doing same thing is there a signal that has to come from logic board or somewhere to switch on 18v to power ysus?Comment
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Re: Lg 50" plasma no picture but sound
Any idea reeceyComment
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Re: Lg 50" plasma no picture but sound
You have a faulty y-sustain.
This TV is quite difficult to troubleshoot because a failed y-sustain pulls down all the other voltages.
Is there a green flashing led on the control board?Comment
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Re: Lg 50" plasma no picture but sound
No green flashing light , but surely if the ysus was at fault i would still get the 18v supply leaving the zsus to feed ysus? With the ysus disconnectedLast edited by johnjgjohn; 01-24-2016, 05:11 PM.Comment
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Re: Lg 50" plasma no picture but sound
Nope, everything has to be working perfectly for this TV to show perfect voltages. It's a pain in the arse.
It's almost certainly a failed y-sus.
Don't know why LG decided to leave their trusted y-sustain and buffer layout and copy the more recent Panasonic SC boards.
Take a close up picture of the lower half of the y-sustain, I probably know what's failed.Comment
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Re: Lg 50" plasma no picture but sound
Lower halfAttached FilesComment
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Re: Lg 50" plasma no picture but sound
Top halfAttached FilesComment
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Re: Lg 50" plasma no picture but sound
OK you see the 3 resistors.
First one is 2.2 ohm (red red gold gold)
Bend them up towards the capacitors and take a photo of the surface mount components below.Comment
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Re: Lg 50" plasma no picture but sound
Better pic of lower half ysusAttached FilesComment
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Re: Lg 50" plasma no picture but sound
Like this?Attached FilesComment
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Re: Lg 50" plasma no picture but sound
Yeah there should be a surface mount capacitor under the 2.2 ohm one, it will be under the glue. Scrape the glue away.Comment
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Re: Lg 50" plasma no picture but sound
Yeh there isAttached FilesComment
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Re: Lg 50" plasma no picture but sound
Put your meter in ohm range and measure across it.Comment
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But it seems they didn't get too far and just left it.
When I first took a look I was amazed at how pristine the inside looked.
Its as if the TV had been in a time capsule.
Caps looked like they were just pulled off the self.
Copper coils had no sign of corrosion on... -
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Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
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Hi all
I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.
Symptom:
No picture no sound.
When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
No sound at all.
What I tried:
1. I tried unplugging the left or right ribbon...
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