Re: LG 47LX6500 No picture - just static - backlight OK
Any assistance in trying to isolate between Tcon and Mainboard would be appreciated.
fconsela
Member
Last Activity: 11-28-2020, 01:38 PM
Joined: 07-04-2018
Location: Sterling, VA
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Re: LG 47LX6500 No picture - just static - backlight OK
Thanks for the link. Good to know if I can isolate it to the main board.Leave a comment:
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LG 47LX6500 No picture - just static - backlight OK
Have just acquired an LG 47LX6500. Powers on, no Logo on screen, screen flickers. No menu on screen. Cycling thru inputs have no change in condition. Static can be heard out of speakers. Left half of screen flickers with horizontal lines randomly. Right side just backlit. All voltages on Power board OK. Disconnecting left and right ribbon cables on T-con produces all white half screen respectively. Disconnecting cable from Main board to Tcon has no effect on condition.
Power/LED: EAY60803402
Tcon: EAX62110705
Main: EAX62073003
Any suggestions?
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LG Plasma 60PB5600 Logic Board no light
Hi all - have something that I havent read about on this site.
Have this LG thast has no video, bad Y-upper buffer (at least).
However, when turned on - the green light on the Logic board (EBR77186601) never illuminates, no blinking either. I know the light works as when I probe it in diode mode it come on.
Would a bad Y buffer and/or Ysus keep prevent the Logic board from coming up? This even happens when I disconnect the logic board to try and jumper EXT_AUTO_GEN (also no test patterns) - never does the light come on.
Where to b... -
Re: LG 60PB5600 no video issue
Can anyone offer any insight?Leave a comment:
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Re: LG 60PB5600 no video issue
Need some more advice - would a bad Y buffer and/or Y Sus cause my TCON board led no to light up? Would hate to spend any money on Y boards if there is a more pressing issue with the TCON light not illuminating.Leave a comment:
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Re: LG 60PB5600 no video issue
SO I think I found the culprit pulling down the 18v on the Zsus. After reading many more threads on LG plasmas, I disconnected the Upper Y Buffer. Lower half of screen has flashing video and the 18v is present on the Zsus.
For fun I then reversed the situation and disconnected only the lower Y buffer (reattached the upper). Big bang and flash out of the upper Y buffer - smd cap blown off!
My excitement was short lived as I thought that I now created more damage so I disconnected the Ysus and checked all voltages on the PS...Leave a comment:
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Re: LG 60PB5600 no video issue
Any idea where I can find the schematic for the Zsus board? Not sure Im getting a good sense of how the 18v is created from just looking at the traces.Leave a comment:
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Re: LG 60PB5600 no video issue
Downloaded the service manual, however it contains no info (that I can tell) on Y & Z Sus's.....
Would first like to see why the Tcon green light isn't lit when turned on - any suggestions?Leave a comment:
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Re: LG 60PB5600 no video issue
Thanks for the website will look for it today.
18v is created on the Zsus board ( I expect off the VA input).Leave a comment:
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Re: LG 60PB5600 no video issue
Here is all the relevant info on my set:
Ysus: EBR77185601
Y-Buffer Upper: EBR77186101
Y-Buffer Lower: EBR186102
Zsus: EBR77185901
Tcon: EBR186601
Logic: EBT62854110...Leave a comment:
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LG 60PB5600 no video issue
Hi all - my LG died while watching the other day. Ive searched the forum and found multiple threads with similar issues but cant seem to find one that is like what I am experiencing.
Here is where Im at:
1) PS voltages all look ok (VS, VA, etc...)
2) Zsus 18v reading 3.6v (my Ysus is cabled top the Zsus - not from PS board - still 3.6v with cable disconnected between Z & Y sus's)
3) Noticed that the green light on Tcon is not on
4) removed LVDS and tried to put into test mode using EXT-AUT-GEN jumped - no display.
5) looked very closely at... -
Re: New Members - please post your introductions here
Hi everyone - hopeful that this forum will help me learn a bit and mostly avoid expensive tv replacements :-)
I am familiar around a DMM and an iron, although my aging eyes dont do so well on the small formfactors these days.Leave a comment:
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