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LG 42LF66 Problem with Screen

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milicis:
Hi, can anyone please advise with some solution for this problem.

When tv is cold it starts fine, after few minutes goes blank, with backlight on and sound on. If I try to restart,
tv does like this (see video)

http://www.youtube.com/watch?v=CJ4syspjK8c

If Im not restarting right after it goes black, then sometimes after about 20-30 min trying to restart it, tv starts up fine, sometimes

with some stripes, but after restart  it again it works fine rest of the evening.

You can see in video that no backlight is coming on and remotely tv is not working.

http://www.youtube.com/watch?v=CJ4syspjK8c

P.S. I checked Caps visually.Cant see any faults.

ProDave:
Most start up troubles are caused by PSU capacitors. Even if they don't look bulged, they may still be faulty.

Start there, possibly by buying a kit to replace all the capacitors on your PSU

sparky:
hi
another test take back of being careful get hair drier warm
caps on psu if it springs to life change caps
dave

milicis:
Thanks for answers.

When tv is cold it starts fine. Problem starts after few min-s. Seems caps are working like :
 
* Cold ( first few minutes) = good startup
* Warming up (next 30 mins) = no startup
* Warmed up (after 30 mins) = good startup
?

scooby-doo:

--- Quote --- TV Tony

Remove the ceratech filters on the main pcb and short across, they are 908,904,903,906,905,902, all are situated near the connector from the psu, p900. the chokes are preceded by fl. this is official from lg



--- End quote ---

The last 3 LG's I have done with start problems has always turned out to be the 4 2200uf 10v caps

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