Author Topic: Samsung Le32b450c4w backlight problem (Read 6447 times)

techno · « **on:** March 20, 2014,02:24:41 »

Hi All
I have a Samsung Le32b450c4w tv with a backlight problem, from cold tv will have picture for about 10 mins then the backlights go off and then there is sound only. The tv has a combined psu/inverter board Bn44-00261b and the panel is Ltf320ap06.There is no sign of usual burning on inverter transformers QGAH02094.
Any ideas?
Thanks

Mulja tv repair portal · « **on:** March 20, 2014,02:24:41 »

jordan · « **Reply #1 on:** March 20, 2014,02:55:16 »

Check ICS-801 (KA431A),TI-802,replace DI-832 (BAV99) with two 1N4148

techno · « **Reply #2 on:** March 21, 2014,02:02:43 »

Thanks for that Jordan,but they checked out ok,the tv will run for hours with no problem so i don't think it is a transformer or backlight fault,when the fault occurs the picture comes on for a few secs then cuts off again.
Thanks

Mulja tv repair portal · « **Reply #2 on:** March 21, 2014,02:02:43 »

grandad h · « **Reply #3 on:** April 09, 2014,10:06:33 »

Remove transformer from the board and then get rid of any solder that's left on the board or on Tx legs. Slight scrape may be needed to clean the solder connections. Re-solder and try. I have resorted to this tactic a few times and been successful. Good luck! Henry.

patmnr1 · « **Reply #4 on:** April 13, 2014,13:27:16 »

Is your tv on dynamic mode? I had the same issue with my led Toshiba, I had the same issue with my led tv and changed the mode to standard and it worked for me so far. try it and revert back

Mulja tv repair portal · « **Reply #4 on:** April 13, 2014,13:27:16 »

Mulja tv repair portal

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