Samsung un58mu6100 vertical lines, fade out in 10 sec

[xfox]

Hello, can somebody looks at this, got TV with vertical lines, screen tot cracked, after tv is turned on, lines appearing on screen and fade out in ab 5-10 sec, after pressing menu or home, appearing again and fade out in some time, voltage on PS looks ok, there is no separate tcon, that looks to me like LCD failure, I checked all caps on lcd boards, no short, can somebody help me to check voltages like VGL VGH

[CapLeaker]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

looks like someone cleaned the tv and water ran into the tab bonds.

[petehall347]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

who is swinging off that fan ?

[xfox]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

Just checked VGH and VGL:
VGH: -7.8V
VGL: -8.0V

[dick_barton]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

I think VGH should be a positive voltage and VGL a negative voltage.

[xfox]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

Found one bad resistor on VGH line R403_P01M, on marking was 330 (underscored 0) suppose to be 33 Ohms, measured from 5KOhms to 50Kohms.
After replacement lines are gone but there is no picture and TV is powering off after 1-2sec, Q499, Q498, Q497 looks ok (tried to replace) same result

[xfox]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

Some more progress... I found issue, on left LCD board, resistance between VGL AND VGH was 29 Ohms, same time on right one nothing I cut off VGH signal next to brown flax ribbon and was able to start LCD, got picture but half of screen is slowing down and colors are bad, is there any chance to fix it, or it's dead already?

[xfox]

Re: Samsung un58mu6100 vertical lines, fade out in 10 sec

Was temporary able to remove short, but late came back, LCD trashed, boards for sale...