LG 42LG50-UA rebooting

[drachenmp]

Hey, I have an 42LG50 that recently started powering up for 2-3sec then powering down, and keeps repeating for about 2-3mins and then it works fine as if nothing is wrong. As soon as i go to turn it off, it start going through the cycle again. I can only turn it off by unplugging it directly! Any ideas as to the cause? I opened the back and blew out dust and checked cap's and all seemed fine. Thanks for the help!

[randtek]

Re: LG 42LG50-UA rebooting

You have not provided any pictures, so I can just give you general information. You really should post pictures of the back of the unit (rear cover removed) and close ups of each board. This will help people assist your troubleshooting.

On the main board, look for a connector, probably on the left or bottom edge of the board. It will have probably 9 -15 small wires coming out of it, and those wires will go down to the bottom of the unit, and across to the left edge (as viewed from behind TV). When you first turn it on (so it is acting up) unplug this connector at the main board, immediately after first turning unit on. If problem continues wht this plug disconnected, your problem is probably on the main board. If it stops with this disconnected, your problem is with one of the 2 small boards that this cable runs to.

If the problem is on one of the small boards, you can then isolate the board by reconnecting the connector at the main board, and unplugging the small connector going to the control (function switch) board on the left edge of the TV, (as viewed from the rear).

[imp]

Re: LG 42LG50-UA rebooting

Hey, I have an 42LG50 that recently started powering up for 2-3sec then powering down, and keeps repeating for about 2-3mins and then it works fine as if nothing is wrong. As soon as i go to turn it off, it start going through the cycle again. I can only turn it off by unplugging it directly! Any ideas as to the cause? I opened the back and blew out dust and checked cap's and all seemed fine. Thanks for the help!

I have the exact same issue with my six month old 50" LG plasma ... Thinking of a warranty replacement but that´s a lot of hassle.

[Austin420]

Re: LG 42LG50-UA rebooting

If worst comes to worst and you can never get this TV to work please let me know. I have the 42LG30-UA and desperately need a new LCD screen!

I'm sure as the cycling, but mine would just turn on then off because of a bad slave inverter & a bad CCFL.