I have a question I just picked up this TV and the back lights are needing replacing they flicker off and on does anyone know or have a video somewhere showing how to remove the screen to replace the back lights on this model any help would be greatly appreciate it thanks everyone
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Re: Samsung un75TU8000 backlight
Make sure it's actually a backlight problem.
Disconnect the cable to main board and see if backlight is still flickering. -
Re: Samsung un75TU8000 backlight
Ok I’ll try this.Comment
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Re: Samsung un75TU8000 backlight
see if that helps, it is good to try to verify the problem before tearing into that BIG screen, the bigger they are the easier they are to break, I don't like using suction cups, some do: https://www.youtube.com/watch?v=KvI7nMP2_M0Last edited by nomoresonys; 01-10-2023, 11:15 AM.Comment
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Re: Samsung un75TU8000 backlight
I unplug the main board and still flashing LEDs and there’s also dark spots where the LEDs aren’t lighting up when they flash, Thank you for the video but that’s not the same 78 like I have there’s no bezel screws on this one.Comment
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Re: Samsung un75TU8000 backlight
I’m sorry 79” not 78Comment
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Re: Samsung un75TU8000 backlight
I'm sorry again 70 inch not 78Comment
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Re: Samsung un75TU8000 backlight
I see, ok guess that one is for different model 75, put your exact model in youtube, might find one.Last edited by nomoresonys; 01-10-2023, 12:32 PM.Comment
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Re: Samsung un75TU8000 backlight
I posted the model wrong it is UN75AU800FComment
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Re: Samsung un75Au800F backlight
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Re: Samsung un75TU8000 backlight
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Re: Samsung un75TU8000 backlight
This is QLED tv correct? I believe it’s thin boarder where screen goes edge to edge. If so it’s glued down and will need to be very careful taking it out. Other than that it’s just like any other tv.
If you have never removed a panel before I don’t recommend this for your 1st one being as big as it is.Comment
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Re: Samsung un75TU8000 backlight
Yeah I believe it is a QLED I’ve replaced some back lights before just makes me a little nervous with the glued in the screen.Comment
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I
It was the backlights replaced them now it working and the screen is held in by the bezel it snaps on to the fame once you remove it the screen will lift out together.Comment
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Re: Samsung un75TU8000 backlight
Very nice work, what technique did you use to remove the screen?
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Re: Samsung un75TU8000 backlight
I used a small screw driver and carefully releasing the bezel, one side then top and other side then clips on bottom once the cables are removed for the screen tape them to the screen I used suction cups with just enough pressure to hold screen don’t squeeze to tight on suction cups. Or you will damage it then just lift and screen comes out with bezel on this model. After this goes just like any other edge lit tv, hope the helps others.Comment
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Re: Samsung un75TU8000 backlight
Nice!!!! Glad you got it fixed and working. Good jobComment
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Re: Samsung un75TU8000 backlight
Thank you everybody on here is been a great help I appreciate it I’m sure I’ll need more in the future lol.Comment
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Hi everyone!
Hope you're all having a great day, and thank you very much for stopping by and taking the time to read this post to help me with my parents' Samsung TV.
My issue: No backlight.
Model: QE82Q70RAT
Type No: QE82Q70RAT
The TV was already serviced by Samsung once under warranty for the exact same issue, but six months after the fix, the backlight went out again. Now, Samsung is asking for nearly the same price as a brand new TV to fix this with the same 6-month guarantee.
So hopefully, I can fix this cheaper.
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- Prior owner tried a replacement main board. No difference.
- Samsung 2x red blinking standby LED = panel fault
- Jumpered FB_TRDY_1 (pin 1 CN1300 left. main tcon->left side buffer boards) and FB_TRDY_3 (pin 95 CN1301 right. main tcon->right side buffer boards) This allows testing individual T-Con (on main board) connection to panel on this Samsung. Found fault on left side (viewing from rear of TV)
- Each side has 2 buffer boards, disconnected left side flex between 2 buffer boards. Fault is on the left most board.
- Tape masking eventually isolated to CN1300 pin 15 (CKV4_GOA) Display
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Symptom is dim backlight - this set came in with almost no backlight.
Samsung UN55JU6500FX2A
1 - Replaced all backlight LED strips (set had lots of hours at level 20 backlight)
2 - Changed out what appeared to be a bad Q9102C on BN44-00807E - not shorted or burned but appeared to be open. I was able to read (with difficulty) the part number - however I may have misread it - Can someone confirm that this is indeed an AOD9N40.
Backlight improved significantly - about like it would be set to a level 3 or 4. Setting all the way to 20 seems to... -
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