Samsung UE32D4010 Backlight problem, led ok

[fanaticgames]

hello I have a backlight problem on this TV, if I unplug the cn201 cable the backlight works perfectly and the voltages are 13v if I connect the cn201 cable the backlight goes off and the voltage drops to 12v, I assume it's a motherboard problem, the question is has anyone had a similar problem? I want to understand if the motherboard is repairable or it's not worth wasting time

[Davi.p]

Re: UE3204010 Backlight problem, led ok

manca la marca e il modello è scritto male...

[nomoresonys]

Re: UE3204010 Backlight problem, led ok

on CNM803, check the blu-on/off pin, so meter set to dcv, black probe on chassis ground, red probe on that blu-on pin, check in standby[tv plugged in but off], take note, leaving the probes where they are, power on tv, take note, does the voltage change and what is the voltage.

[nomoresonys]

Re: UE3204010 Backlight problem, led ok

This is an English language only site, at least that's what it use to be.

[fanaticgames]

Re: UE3204010 Backlight problem, led ok

on CNM803, check the blu-on/off pin, so meter set to dcv, black probe on chassis ground, red probe on that blu-on pin, check in standby[tv plugged in but off], take note, leaving the probes where they are, power on tv, take note, does the voltage change and what is the voltage.

0v standby
4,4v power on

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

ok, thats seems good.

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

ok, maybe try unhook cable from mainboard to panel, turn tv on, what does it do? is the optical input lit red on mainboard?

[fanaticgames]

Re: Samsung UE32D4010 Backlight problem, led ok

ok, maybe try unhook cable from mainboard to panel, turn tv on, what does it do? is the optical input lit red on mainboard?

if I unplug the display it does the same thing, the backlight goes off after 1/2 seconds, the red light of the optical port goes on normally for a few seconds and goes off

the image of the display can be seen perfectly and only that the backlight is missing

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

can you clarify, you mean you can see the image perfectly for 2 seconds then it goes off? if so, see if you can still see the image with a flashlight if you look really closely.

[fanaticgames]

Re: Samsung UE32D4010 Backlight problem, led ok

can you clarify, you mean you can see the image perfectly for 2 seconds then it goes off? if so, see if you can still see the image with a flashlight if you look really closely.

the display works, the backlight doesn't (it flashes as soon as I turn on the TV and then turns off), if I unplug the power supply from the motherboard the backlight works correctly

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

seems like a mainboard issue.

[fanaticgames]

Re: Samsung UE32D4010 Backlight problem, led ok

seems like a mainboard issue.

yes what I thought, I put the post maybe someone tried to repair the motherboard without buying a new one

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

you can check mainboard for voltages, video there, not in English but shows what voltages to expect on mainboard: https://www.youtube.com/watch?v=YE_Sx573E_Y

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

there's probably more that go into greater detail on there but the search on youtube isn't that great, you would think it would be better since google owns youtube.

[fanaticgames]

Re: Samsung UE32D4010 Backlight problem, led ok

there's probably more that go into greater detail on there but the search on youtube isn't that great, you would think it would be better since google owns youtube.

if I set the film mode the brightness appears, in the other 2 modes the image is barely visible, is it a problem of exhausted led bars then?

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

turn off any energy saving settings, like eco mode or whatever it might be called, do a simple reset, unplug tv, hold power button for 30 seconds, plug it back in and try it, did you try adjusting the brightness? wonder if a factory reset would help.

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

this seems strange, usually when it's the backlights no mode will work properly.

[fanaticgames]

Re: Samsung UE32D4010 Backlight problem, led ok

turn off any energy saving settings, like eco mode or whatever it might be called, do a simple reset, unplug tv, hold power button for 30 seconds, plug it back in and try it, did you try adjusting the brightness? wonder if a factory reset would help.

tried another motherboard, it does the exact same thing, I think it's the exhausted LED lamps

[fanaticgames]

Re: Samsung UE32D4010 Backlight problem, led ok

this seems strange, usually when it's the backlights no mode will work properly.

Yes I know but also because now I noticed that the backlight is shaking cold

[nomoresonys]

Re: Samsung UE32D4010 Backlight problem, led ok

well, guess its time to strip it down and investigate the backlights, just treat the panel gently, luckily it's a 32 and shouldn't be too hard to manage, can take video or pictures along the way if anything looks like it would be hard to remember how to re-assemble, need to be careful not to rip or stress the panel board connections to the screen.