32LC56 Flickering Screen ?

[ReeceyBurger123]

Hello everyone, requesting for some help. I have here an32" Lg model 32LC56 the symptoms of failure today are that the screen flickers after the tv warms up. I have changed all the output caps as one was bulged so I changed all the Samwha Wb caps with Panasonic Fm. Now I dont feel that this is an Lcd Glass failure as when the flickering appears the backlight flickers along with any image on the lcd screen. I am aware that these use smart backlight dimming or whatever but dont think that a failing Lcd Glass would also cause the backlight to flicker ? Has any one got any info on these sets and this failure googled it but answers are inconclusive TIA ?

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Anyone ?

[tom66]

Re: 32LC56 Flickering Screen ?

Could be a bad panel, fixed the 26LC56 with same fault - tab bond failure - generally found 26" Chimeis to take well to tab shims so might be fixable. not sure about 32" set though, may use LG panel.

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Its an Lg panel but it seems to only occur when I heat the mainboard flexing the panel doesnt affect the issue strange might tab it anyway to be sure.

[budm]

Re: 32LC56 Flickering Screen ?

Can you disable smart dimming?

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Good idea will do later and see what happens cheers

[manstoblame]

Re: 32LC56 Flickering Screen ?

Hello everyone, requesting for some help. I have here an32" Lg model 32LC56 the symptoms of failure today are that the screen flickers after the tv warms up. I have changed all the output caps as one was bulged so I changed all the Samwha Wb caps with Panasonic Fm. Now I dont feel that this is an Lcd Glass failure as when the flickering appears the backlight flickers along with any image on the lcd screen. I am aware that these use smart backlight dimming or whatever but dont think that a failing Lcd Glass would also cause the backlight to flicker ? Has any one got any info on these sets and this failure googled it but answers are inconclusive TIA ?

May be the backlight tube itself is beginning to fail? or the connector to the bulb is loose its really hard to say and everything and anything else would just be guessing

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

This tv is a weird one, I factory reset it and turned off that crappy backlight feature which just makes the screen look dim and rubbish and now no flickering at all wtf ? Only got 4 screws in the back as well not a single glitch even after 1 hour and its nice and warm crazy will update if anything happens.

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Ok the issue only appears when the whole screen seems to be addressed, when its on a black screen with menu works fine but when watching tv and the whole screen is working and every line is being scanned it messes up is it possible that a tab driver is failing when it gets used which is causing the whole screen to mess up ?

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Or could it be a Tcon or Mainboard fault very strange as fault only happens when whole screen is being used

[CapLeaker]

Re: 32LC56 Flickering Screen ?

try cooling the board(s) after it's warmed up

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Will do cheers mate, strange one for sure going to make a youtube video on it.

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Tv is fixed !! Was two caps on the Mainboard which were causing a dip in the voltage that goes to one of the regulators. Will make a new thread and youtube video on the fix thanks everyone

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Also after replacing the caps notice a huge change in the overall image quality picture before seemed dim and poor contrast with the new caps picture seems bright and sharp amazing what bad caps can do seems to be all sorted

[retiredcaps]

Re: 32LC56 Flickering Screen ?

Was two caps on the Mainboard which were causing a dip in the voltage that goes to one of the regulators.

Did you actually see the DCV dips on the voltage regulator? A multimeter with min/max is helpful in situations like this.

[Rickig]

Re: 32LC56 Flickering Screen ?

Change c970 cap on main board, 16v 100uf.

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Did you actually see the DCV dips on the voltage regulator? A multimeter with min/max is helpful in situations like this.

Yes after replacing the cap the voltage went up by .4 of a volt and the set works fine.

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Change c970 cap on main board, 16v 100uf.

Thats the one that fixed it

[Rickig]

Re: 32LC56 Flickering Screen ?

Glad to have helped

[ReeceyBurger123]

Re: 32LC56 Flickering Screen ?

Cheers