Hi all. I have searched the forums and found similar posts, I have specific troubleshooting I have done thats why I posted a new thread. I have a 50" LG plasma I bought in 2009. Just popped and no picture. I try to turn it on again and tries to come on, makes a buzz noise by the z sus board, then quickly shuts off. If I unplug the z board from the power board (larger wires) and control board (smaller wires) the tv works but is dim and eventually turns mostly red color. If I connect the z sus to the power board, same thing. But if I connect it back to the control board it has the problem where it will buzz and turn off. No visual damage to any components that I can see. So I figure its either the z board or control board. I just ordered the z sus since that's what makes the buzz noise. The tv is a 50PS something. Any thoughts? I can post pictures and get the full model number if someone is listening. Thank you! Stupid tv!
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Re: LG pop of death - troubleshooting
I would agree with your conclusion. It's pretty typical to see a dim picture without a functioning Z-board. Replacing that should be all that's necessary.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: LG pop of death - troubleshooting
Thanks for the response. I just hope that when I change out the z sus that the control board has something messed up and causes that one to go too. Wouldn't figure that that particular connection would cause an issue...Comment
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Re: LG pop of death - troubleshooting
I have never seen a bad control board kill a sustain. It could happen, but it would most likely be due to bad software on the control board, not a physical fault.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG pop of death - troubleshooting
Ok great, thank you. Amazing how many people have had problems. Although 1080p is awesome, they don't make tvs like they used to.Comment
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Re: LG pop of death - troubleshooting
When the Z-sus goes bad you get underdiffusion. This usually manifests itself as red or blue pixels misfiring, depending on the panel technology. Never seen it with green, but wouldn't rule it out.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Hi all, I just want to share the repair of my 60PK550-UA TV set.
The TV set was powering on, just no image. After verification, nothing wrong on the YSus or ZSus boards. Nothing wrong on the main board either.
But I noticed that the LED was not flashing on the Logic Control Board. This is an EBR63450301. The LED is supposed to flash even with all the flat cables disconnected, with only the power cable attached.
All the voltages measured at the electrolytic capacitors on the board were good. From top left to bottom right:
C57: 3.30V
C61:...07-20-2023, 12:38 AM -
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- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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