LG 42LG20-UM Hirizontal line & Solid line

[arman960]

I have this tv . When I turn it on , one third screen on the top gets line like picture. After a few minutes warming up the tv, the line becomes solid strap black line. does anybody has any idea what causing this issue? any loose connection or inverter board issue?

[tom66]

Re: LG 42LG20-UM Hirizontal line & Solid line

This is a bad LCD panel - most likely tab bonds - may be fixable.

[arman960]

Re: LG 42LG20-UM Hirizontal line & Solid line

I opened the LCD panel and put some double sided tape on each ribbon connection. This tv used to have half right side panel black problem. Warmup used to fix this dark half screen.

Now after I put those tape on each ribbon, the old issue is not there anymore , now all I get is this horizontal line on the top.

[jamesharris]

Re: LG 42LG20-UM Hirizontal line & Solid line

Half right side panel black can be Logic board or connectors to this board. Try removing ribbon cables and clean them or just reset them (reinstall) Ensure they are sitting flat and are not crimped or squashed in any way. Also remove oily block from underneath board and aim it at the rubbish bin.

[kevinm34232]

Re: LG 42LG20-UM Hirizontal line & Solid line

Had a Toshiba with same right half-side would go black AFTER warmup, was tab bond issue and that was fixable but still had 2-3 small vertical lines in screen..