Sharp LC-42LB261u LCD TV flickers more while increasing backlight

[Anooc7]

Re: Sharp LC-42LB261u LCD TV flickers more while increasing backlight

Sharp LB series has backlight issues. Replace them all with new. Your LED tester only puts out 20mA while your TV can run at several hundred mA.

Absolutely, It was the faulty leds , replaced 5 of them. TV is working fine, told the customer to limit the bl level.
Thanks

[neilc6]

Re: Sharp LC-42LB261u LCD TV flickers more while increasing backlight

Sharp LB series has backlight issues. Replace them all with new. Your LED tester only puts out 20mA while your TV can run at several hundred mA.

[Anooc7]

Hi,
This particular TV (LC-42LB261u) flickers more as I increase the backlight from ~10% onwards. Please find the attachment. Is it the backlight leds? I changed the 3 capacitors shown in figure, but still the issue remains the same. When it blinks I can hear a buzzing noice from the big o/p transformer. I checked the two led lines with backlight testet and both showing ~ 25.xx volts . Any inputs?

Thanks