Mulja tv repair portal

Equipment Repairs => LCD TV forum => Topic started by: blackmail on August 11, 2011,09:31:30

Title: lg32lc46 sync error
Post by: blackmail on August 11, 2011,09:31:30

The board works ok, but after 5 mins the picture breaks up,
looks like sybc is missing.  heat up Genesis display fli8548hlf and the sync stabilzes until the chip cools down and the fault returns. 
anyone got any suggestions?

Title: Re: lg32lc46 sync error
Post by: watteau on August 11, 2011,10:39:58

Hi,
Worth checking the LT lines on the signal board, (voltages, and for any noise on them),
when the fault appears.
Regards,
John

Title: Re: lg32lc46 sync error
Post by: blackmail on August 12, 2011,06:55:29

i have checked the lt lines and they all seem ok.
i have bought another board for this tv off ebay and the problem i am getting on this board is . Immediately after the mains cable is inserted, the green power LED flashes 5 or 6 times, then flashes red once, then goes out. The set, obviously, then doesn't work. This is an intermittent fault which is getting more frequent suggesting component failure somewhere on the psu (P/N EAY34795001). Is this a known fault with a solution, or am I replacing the entire board?

Title: Re: lg32lc46 sync error
Post by: sparky on August 12, 2011,07:42:51

hi
have you checked the caps in psu they look ok
but loose capacitaince check with esr meter
dave

Title: Re: lg32lc46 sync error
Post by: blackmail on August 12, 2011,11:24:02

checked those caps in the psu voltage is ok in psu but the tv switches off with one video board and is distorted with the other board

Title: Re: lg32lc46 sync error
Post by: blackmail on August 19, 2011,08:53:35

fixed this by putting the cpu eprom from the original board on the board that i bought on hte internrt an it stopped switching inself off