samsung tv ue43ru7400u dark screen problem help

garysnooker · 05-13-2022, 11:46 AM

Hi its like the brightness is trun right down ive reset the TV.help

**dskall** · 05-13-2022, 12:01 PM

Some pictures of the problem would be nice.

garysnooker · 05-13-2022, 12:18 PM

its to dark for pictures

**dskall** · 05-13-2022, 01:04 PM

Bad backlights.

garysnooker · 05-13-2022, 01:10 PM

is that a big job

garysnooker · 05-13-2022, 01:26 PM

there is a Picture but it is dark

**dskall** · 05-13-2022, 02:31 PM

Sorry your giving little to go on, but my tv is dark, what's wrong.

garysnooker · 05-13-2022, 02:48 PM

Hi is there a way i can test the backlights.

**dskall** · 05-13-2022, 02:51 PM

Is your screen uniformly dark?

**nomoresonys** · 05-13-2022, 02:52 PM

garysnooker · 05-13-2022, 03:11 PM

Quote:

Originally Posted by dskall

Is your screen uniformly dark?

Hi yes it is

**nomoresonys** · 05-13-2022, 03:17 PM

nevermind, too much trouble trying to help, when simple instructions are not followed.

garysnooker · 05-13-2022, 03:27 PM

Quote:

Originally Posted by nomoresonys

working blind here without pictures.

will do pictures.tomorrow

**brucetv** · 05-14-2022, 05:47 AM

Most likely you have a short in the backlight bars since this is a edge lit Tv. Alot of times is actually melts the diffuser and will leave light bleed on the bottom where the leds got too hot after you replace the led bars and you can't buy new diffusers so is it worth repairing? Not on that size Tv. You have to pull the panel just to get to the backlights and if the diffuser is melted there is no use in replacing them because they are just going to leave light bleed across the bottom of the panel which looks like crap. Samsung quality went to hell a long time ago spending more money fighting corruption charges than on engineering.

garysnooker · 05-14-2022, 06:46 AM

thanks for your help on this im going to take it apart and have a look at it nothing to lose

**vinceroger69** · 05-14-2022, 07:01 AM

Quote:

Originally Posted by garysnooker

thanks for your help on this im going to take it apart and have a look at it nothing to lose

This thread is worth a read
https://www.badcaps.net/forum/showth...=samsung+burnt

garysnooker · 05-15-2022, 07:40 AM

Hi is there a way of testing the backlight before a take it apart

**vinceroger69** · 05-15-2022, 08:09 AM

Quote:

Originally Posted by garysnooker

Hi is there a way of testing the backlight before a take it apart

yes if you have a backlight tester,
what happens if you remove the cable between mainboard and power supply do the backlights power on then?
This will give you a rough idea whats involved to change backlights but remember big risk of cracking lcd panel!
https://www.youtube.com/watch?v=HFi2slA4ZK8

garysnooker · 05-18-2022, 12:38 PM

Hi ive just had a another look at the tv and im not to sure if it is the backlight ive made a video could some one have a look at it to see if it is the backlight https://www.youtube.com/watch?v=fJe-APbbSjE

**vinceroger69** · 05-18-2022, 12:50 PM

I would say faulty backlights.

05-13-2022, 11:46 AM	#1
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	samsung tv ue43ru7400u dark screen problem help Hi its like the brightness is trun right down ive reset the TV.help

05-13-2022, 12:01 PM	#2
dskall Badcaps Veteran Join Date: Oct 2016 City & State: Bakersfield ca. My Country: usa Line Voltage: 120VAC 60Hz I'm a: Knowledge Seeker Posts: 2,732	Re: samsung tv ue43ru7400u dark screen problem help Some pictures of the problem would be nice. __________________ I assume no responsibility for any stupid suggestions I might post.

05-13-2022, 12:18 PM	#3
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help its to dark for pictures

05-13-2022, 01:04 PM	#4
dskall Badcaps Veteran Join Date: Oct 2016 City & State: Bakersfield ca. My Country: usa Line Voltage: 120VAC 60Hz I'm a: Knowledge Seeker Posts: 2,732	Re: samsung tv ue43ru7400u dark screen problem help Bad backlights.

05-13-2022, 01:10 PM	#5
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help is that a big job

05-13-2022, 01:26 PM	#6
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help there is a Picture but it is dark

05-13-2022, 02:31 PM	#7
dskall Badcaps Veteran Join Date: Oct 2016 City & State: Bakersfield ca. My Country: usa Line Voltage: 120VAC 60Hz I'm a: Knowledge Seeker Posts: 2,732	Re: samsung tv ue43ru7400u dark screen problem help Sorry your giving little to go on, but my tv is dark, what's wrong.

05-13-2022, 02:48 PM	#8
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help Hi is there a way i can test the backlights.

05-13-2022, 02:51 PM	#9
dskall Badcaps Veteran Join Date: Oct 2016 City & State: Bakersfield ca. My Country: usa Line Voltage: 120VAC 60Hz I'm a: Knowledge Seeker Posts: 2,732	Re: samsung tv ue43ru7400u dark screen problem help Is your screen uniformly dark?

05-13-2022, 02:52 PM	#10
nomoresonys Badcaps Veteran Join Date: Jan 2013 City & State: midwest My Country: U.S. I'm a: Knowledge Seeker Posts: 7,868	Re: samsung tv ue43ru7400u dark screen problem help . Last edited by nomoresonys; 05-13-2022 at 03:22 PM..

05-13-2022, 03:17 PM	#12
nomoresonys Badcaps Veteran Join Date: Jan 2013 City & State: midwest My Country: U.S. I'm a: Knowledge Seeker Posts: 7,868	Re: samsung tv ue43ru7400u dark screen problem help nevermind, too much trouble trying to help, when simple instructions are not followed. Last edited by nomoresonys; 05-13-2022 at 03:26 PM..

05-14-2022, 05:47 AM	#14
brucetv Badcaps Veteran Join Date: May 2015 City & State: springdale ar My Country: united states I'm a: Professional Tech Posts: 234	Re: samsung tv ue43ru7400u dark screen problem help Most likely you have a short in the backlight bars since this is a edge lit Tv. Alot of times is actually melts the diffuser and will leave light bleed on the bottom where the leds got too hot after you replace the led bars and you can't buy new diffusers so is it worth repairing? Not on that size Tv. You have to pull the panel just to get to the backlights and if the diffuser is melted there is no use in replacing them because they are just going to leave light bleed across the bottom of the panel which looks like crap. Samsung quality went to hell a long time ago spending more money fighting corruption charges than on engineering.

05-14-2022, 06:46 AM	#15
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help thanks for your help on this im going to take it apart and have a look at it nothing to lose

05-15-2022, 07:40 AM	#17
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help Hi is there a way of testing the backlight before a take it apart

05-18-2022, 12:38 PM	#19
garysnooker New Member Join Date: May 2022 City & State: london My Country: uk I'm a: Knowledge Seeker Posts: 14	Re: samsung tv ue43ru7400u dark screen problem help Hi ive just had a another look at the tv and im not to sure if it is the backlight ive made a video could some one have a look at it to see if it is the backlight https://www.youtube.com/watch?v=fJe-APbbSjE

05-18-2022, 12:50 PM	#20
vinceroger69 Badcaps Veteran Join Date: Mar 2012 City & State: Nuneaton Warwickshire My Country: uk I'm a: Hobbyist Tech Posts: 6,394	Re: samsung tv ue43ru7400u dark screen problem help I would say faulty backlights.

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