lg 47ln5200

[cdog14550]

hoping someone can send me in right direction. Tv was working fine then total blackout, no sound, pic or standby light. would not turn on after thar so shorted out plug wire and held tv power button for a minute, plug in and stand by light came back on and fired right up. lasted about a week and is happing more often and now lasts only about 10 minutes. was thinking ps board or main now i read about possable led light issue. dont want to replace everything!
thanks in advance

[Hamie]

Re: lg 47ln5200

Pictures and voltage readings would help.

[budm]

Re: lg 47ln5200

pictures and voltage readings would help.

+10

[cdog14550]

Re: lg 47ln5200

ill have time to post this weekend
thx

[cdog14550]

Re: lg 47ln5200

ok, heres the voltages when on
1 3.4 pwr-on 10 3.3 drv-on
2 3.5 11 3.3
3 3.5 12 1.0
4 0 13 0
5 24.4 14 24.4
6 0 15 0
7 12 16 12
8 12 17 0
9 0 18 0

in standby with light on pins 2 and 3 have 3.5v and all others are 0
according to psu this is all correct and the tv is running properly but at any second black screen, no sound no stand by light and wont power on til i short power cable and hold power button for a minute or so. i will let it run and get voltages when the tv goes to black screen

[dick_barton]

Re: lg 47ln5200

Do you lose your PWR_On when it goes to black/no sound

[cdog14550]

Re: lg 47ln5200

waiting for over an hour to go black!! never not works when you want it to

[dick_barton]

Re: lg 47ln5200

Welcome to the joys of servicing.

[Hamie]

Re: lg 47ln5200

Bad solder joint maybe.
Try pressing on the power supply with the butt of a screwdriver and see if it goes off.

Maybe a bad connection elsewhere try twisting the frame of the tv see if it goes off.