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LG 37LG50 - Non-Responsive Menus, Horizontal Lines etc    
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andrew520



Joined: 22 Sep 2016
Posts: 2
Location: Tucson, AZ

PostPosted: Thu Sep 22, 2016 7:19 pm    Post subject: LG 37LG50 - Non-Responsive Menus, Horizontal Lines etc Reply with quote

Model: LG 37" LCD 37LG50

TV turns on, have constant audio. Sometimes only the top 3" of the screen will be working with horizontal lines, then the entire screen will work with a few horizontal lines at the top. The snow screen will consistently freeze for 1-2 seconds at a time. Then menus are intermittently responsive.

I bought a quality capacitor kit for the Power board and replaced all capacitors except for the 2 large ones which were not included in the kit. Good solder joints on everything I replaced. Cables all looked good from visual inspection. TV was never hit or taken apart before this started.

I bought a "good" used T-Con video board off a reputable ebay seller and installed it. Both repairs had NO effect, it's neither worse nor better. Should I give up or go a different route.

See pics below

http://imgur.com/lxKab2T

http://imgur.com/D1dPXS9

help greatly appreciated.
Google

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kuhurdler



Joined: 28 Dec 2006
Posts: 2858
Location: Overland Park, KS

PostPosted: Fri Sep 23, 2016 9:06 am    Post subject: Reply with quote

Based on your pictures, my money is on it being bad tab bonds. If I'm correct... You might be able to get it to work by putting pressure in the right spots, but there is no real fix besides replacing the panel.
JTS1957



Joined: 21 Jan 2009
Posts: 2328
Location: Far, Far Away

PostPosted: Fri Sep 23, 2016 9:21 am    Post subject: Reply with quote

And remember according to Shop Jimmy:

IMPORTANT: Horizontal lines on the screen are virtually NEVER caused by a bad T-con board. Horizontal lines indicate a defective LCD panel (screen).
kuhurdler



Joined: 28 Dec 2006
Posts: 2858
Location: Overland Park, KS

PostPosted: Fri Sep 23, 2016 9:26 am    Post subject: Reply with quote

however, the menus being sometimes unresponsive lead me to consider the mainboard as a strong possibility.
andrew520



Joined: 22 Sep 2016
Posts: 2
Location: Tucson, AZ

PostPosted: Fri Sep 23, 2016 5:04 pm    Post subject: Reply with quote

I didn't think a panel problem would lead to non responsive menus and intermittent freezing of the screen which by the way when the screen freezes the static audio sound doesn't cut out with it. The non responsive menus and few seconds of freezing were what let me to think the main board was bad and why I replaced that. It's weird because the menus work when they want.

Appreciate every one's help. Very Happy
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JTS1957



Joined: 21 Jan 2009
Posts: 2328
Location: Far, Far Away

PostPosted: Fri Sep 23, 2016 7:31 pm    Post subject: Reply with quote

You said you replaced caps on the Power Supply and replaced the Tcon. When was the Main board mentioned in earlier posts?
I won't comment on frozen screen and static sound until an 'active signal' is in play.
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