Lg 42lg30 ua

[nlkirchn]

If I leave this TV off by unplugging it for 24 hrs when I plug it in it won't on unless I turn it on with the remote or the button on the set and it comes on normally and will stay on. If I turn it off with the remote or the button on the set it will automatically cycle back on. Most of the time it will stay on but sometimes it will only stay on for a few seconds and start the cycle again. I have replaced all of the capacitors on the power board and replaced the main board with a new one and still have the same result. It still cycles on if I disconnect the board that has the IR and ON/OFF button on the front. All of the voltages referenced on the boards are very close (+_ .05 V)when the TV is operating normally. I have scoured the internet looking for a manual with a schematic and all I can find are block diagrams which are of no help. Can someone point me in the right direction to resolve this?

[sordids999]

Re: Lg 42lg30 ua

Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem

[nlkirchn]

Re: Lg 42lg30 ua

I will get them together and upload them. Here they are Power board Main Board and full view.

[fzabkar]

Re: Lg 42lg30 ua

What is the chassis number?

FYI, here is the service manual (with circuit diagrams) for an LG 26LG30-UD, chassis LA85D:


32LG30-UA, chassis LA85A:

[nlkirchn]

Re: Lg 42lg30 ua

Thanks for the link to the schematic it should lead me to a solution.