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Equipment Repairs => LCD TV forum => Topic started by: buggsy on October 18, 2012,11:13:46

Title: LG 37LC55 POWER UPS SCREEN GOES GREY NO RESPONSE
Post by: buggsy on October 18, 2012,11:13:46

I HAVE A LG 37LC55 SET CAME IN WITH CAPS BLOWN IN THE USUAL LOCATIONS
SETS SEEMS TO POWER UP WITH ALL FUNCTIONS START FIRST TIME INSTALATION RETUNES FINE ALL WORKING OK.

POWER DOWN SET AND POWER UP AGAIN GREY SCREEN WITH SOUND UNABLE TO RESPOND TO REMOTE OF SIDE BUTTONS. POWER DOWN BY MAINS LEAVE APPROX 20/30 MINS POWER UP ALL NORMAL SET WORKS FOR AROUND 30 MINS THEN SCREEN GOES GREY AND LOSS OF REOME CONTROL AND SIDE BUTTON FUNCTIONS.

ANY IDEAS BOFFINS ? :41:

Title: Re: LG 37LC55 POWER UPS SCREEN GOES GREY NO RESPONSE
Post by: t1412 on October 18, 2012,14:10:11

test the rest of the caps with esr meter in the power supply if all ok, try a epprom reset

regards
shaun   

Title: Re: LG 37LC55 POWER UPS SCREEN GOES GREY NO RESPONSE
Post by: watteau on October 24, 2012,03:05:15

Hi,
I seem to recall there was a service bulletin a while ago for lots of intermittent problems
due to intermittent 'Ceratech' chokes.
Have a search on this forum, using the word ceratech'
Regards,
John

Title: Re: LG 37LC55 POWER UPS SCREEN GOES GREY NO RESPONSE
Post by: downunder on October 24, 2012,05:12:47

Check C503 and C901 on the main board.

Title: Re: LG 37LC55 POWER UPS SCREEN GOES GREY NO RESPONSE
Post by: jordan on October 24, 2012,05:31:44

Chassis LD73A
Check C-954,C-958,C-970 on main PCB board