Tom C
Member
Last Activity: 09-22-2024, 10:00 AM
Joined: 09-19-2024
Location: New Jersey
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Yeah, but I still enjoyed the challenge, learned something and found this forum. Win all around. -
The white/blue are in pairs (clear/yellow) as seen in the photo. I now know from, thanks to this forum, to power up the LEDs [U]before[/U] reassembly.
Unfortunately, while moving the LCD panel, I cracked the corner. Pretty sure that’s the end for this TV.
I want to thank all who helped me with this project and am looking forward to being part of future discussions.
TomThe white/blue are in pairs (clear/yellow) as seen in the photo. I now know from, thanks to this forum, to power up the LEDs [U]before[/U] reassembly.
Unfortunately, while moving the LCD panel,Leave a comment:
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Yes, you are correct. H is for the white light, L is for the blue.
Original set are the same part number for each side. Of the original pair, one side lights only the blue, other both white and blue. The blue only strip was defective.
I usually buy tv parts from Shop Jimmy, but they didn't stock the edge strips I needed.Leave a comment:
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Thanks EB. Unfortunately I got them off eBay and will have to contact the seller.2Leave a comment:
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Opened it up and one side is brighter than the other.
The part numbers are different on the strips. 🙄...Leave a comment:
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I figured I should start from the beginning and reinstalled the original boards.
Checked the original edge strips with an LED tester and measured 176 V on the H+, H- and L+,L-.
Powered up and did the factory reset and then disconnected the main board and there's no change.
Used LED tester on the new edge strips from the pins on the power board, 172 VDC.
Measured DCV at the pins out to the edge lights on the power board and have the following:
Pin. Desc. DCV
1. 1H- 94.4
2. 1L- 94.4
3. 1+ 282.4
4. 1+ 282.4
5. 2H- 94.5
6. 2L- 94.3...Leave a comment:
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This was the original problem. Now the same issue, but on the other side.
Any way to check the LED strips? They all seem to light when powered up.
Tomorrow I’ll be able to spend more time on using the suggestions I received.
thanks again....Leave a comment:
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Thanks for the replies.
I haven't done the factory reset yet, but did update the firmware.
Just for clarification, both sides light up, one side is dimmer than the other.
I did unplug the main board and both sides light up, right side is dimmer than the left. I'll replace the original and re check.
It’s the dim portion switching sides that has me wondering.Leave a comment:
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Samsung QN55Q70AAFXZA Half Screen Dim
I’m working on a Samsung tv for my son. When I brought it home the left side of the screen was dim, right side ok. I’ve replaced the LED edge strips, main board and now the power board. The only difference is that the dim side has switched from left to right. Is there something else I should be looking at? I’ve also replaced the ground tape (Faraday tape?) from the LCD screen to the chassis. I probably have a week left on returning the parts.
Any suggestions would be appreciated.
thanks. -
Retiree who does some electronic repair without any formal training. Looking for a place to find help when needed and offer what I can.
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