odie34
Member
Last Activity: 05-01-2024, 05:04 PM
Joined: 05-15-2016
Location: Westport, CT
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Sorry.. it's already gone, but I'll know for next time. Thanks for all of your help. -
I still have the boards. I'll list them when I have time...Leave a comment:
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Darn! I didn't realize that that was a possibility. I thought that there was nothing to do if there was a short in the screen so I recycled it. Next time...Leave a comment:
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Sorry that it's taken so long, but I wanted give a quick update to everyone who has helped me through this process... Unfortunately it turns out that the problem was a bad panel. Over the course of my tests and board swaps I was finally able to get definitive proof, which can be seen about 12 seconds into the video at [URL]https://youtu.be/HD1rEY37GRY[/URL]
You can see a thin black line about 10% down from the top of the screen. Very disappointing, but it was fun working on it and I really wanted to thank you all for your help. Hopefully I'll have better luck next time.Sorry thatLeave a comment:
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I know that you can remove one of the two cables between the T-Con and the panel on standard (non-OLED) TVs to help identify where a short is in the panel. Can you do the same thing with OLEDs or might that damage something? (It would be a pretty definitive test if the TV stayed on when connected to one side but not the other.)Leave a comment:
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I received the replacement power board and T-Con today. I installed them one-at-a-time, but the problem still remains… The TV turned on and acted fine, but then shut down a few seconds later. At this point the only things left are the main board and the panel. The panel seems more likely given the other tests we’ve done, although the screen looks perfect for the few seconds while the TV is on. I suppose it could be a problem with the LVDS cable, but how often does that happen? Any suggestions?Leave a comment:
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Davi.p[USER="13553"]Davi.p[/USER] Both the T-Con and power board are returnable. I could see trying to fix the original power board...Leave a comment:
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I don't have a reflow station, but am open to trying an alternative method before I install the new T-Con (if the new power board doesn't help)....Leave a comment:
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The reason why I'm so timid is that knowledgeable folks have indicated that there's panel-specific configuration data in the eMMC, so replacing the T-Con may cause other problems. (I've seen pics of OLEDs that were "successfully" repaired by replacing the T-Cons, but the screens look terrible, and people are asking how to transfer the configuration data.) I've also read that you may need to update the firmware to marry the T-Con with the main board and/or the panel. So I don't know if I'd be able to go back to the old T-Con so easily if it turns out that the problem is elsewhere. (At...Leave a comment:
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But what about the 2 flashes? And i can still get the TV to turn on… I just get the 2 flashes occasionally....Leave a comment:
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Okay... Next update: I thought I'd look into [USER="75051"]Diah[/USER] 's suggestion of pulling the error detection pin low, but now I's seeing that while the TV continues to do 5 flashes, it's intermittently giving 2 flashes. I assume that that suggests an issue with the power board. It doesn't seem to be related to TCON in any way. Should I be looking closer at the power board?DiahLeave a comment:
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Hi All! I've returned and am getting back to this. I think my next step is to get a replacement TCON, but both [USER="75051"]Diah[/USER] and [USER="169795"]lotas[/USER] indicated that I couldn't just swap in a replacement board. (Perhaps there's some configuration data in the board itself that needs to be transferred.) Can someone with knowledge of this let me know what (if anything) I would need to do this properly? Also, does anyone know where I can get a service manual for this so I'm not going into it completely blind? Thanks!Diah...Leave a comment:
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I want to let you all know that I’m going to be away for a week, so I won’t be able to continue looking at this until next weekend. In the meantime I can confirm that there’s no TCON_12V either when the optic light is on in the test I was doing. I’m inclined to try a TCON replacement when I get home. Maybe Diah can explain his concerns about that in the meantime.Leave a comment:
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I think I was right about standby. The optic light is on but there's no power on EVDD. At that point pressing power causes the white power led to turn on and the relay to click, but then the optic light turns out and the red power LED starts flashing 4 times. I don't think the TV likes having no power to the EVDD sockets.Leave a comment:
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Davi.p[USER="13553"]Davi.p[/USER] Thanks for the suggestion. I'm thinking that the TCON is the most likely thing as well, but both Diah and lotas indicated that TCON boards are paired to the panels on OLEDs...Leave a comment:
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Diah[USER="75051"]Diah[/USER] The optic light was on for about 30 minutes and I plugged in the middle EVDD cable. Nothing happened. (No picture and the optic light stayed on.) I considered plugging in the other EVDD cable but thought I'd wait for suggestions first.Leave a comment:
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I did leave it on for a couple of minutes to make sure that the light remained on, although it wasn’t as long as 5 minutes. I pressed the power button after a couple of minutes because even though the optic light was on, I hadn’t heard the relay click on the power supply. This suggested to me that the TV was probably in standby mode. (I still believe this to be true.)
I’ll do the same test again tonight, but try harder to get the TV in a mode where the relay is engaged. If successful (and the optic light stays on) then I’ll attach the EVDD as you suggested.Leave a comment:
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Okay, So I connected everything except the 2 EVDD sockets on the TCON and did a hard reset. After doing that I pressed the power button. The power supply didn't click, but about 5 seconds later the optic light turned on briefly and went out again. A few seconds after that the optic light came back and stayed on. I left it in this state long enough to convince myself that it was stable. Then I pressed the power button again. This time I heard the power supply click on and off, the optic light turned off, and the power LED began flashing 4 times.
I then connected the EVDD sockets and...Leave a comment:
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EazyBone[USER="477674"]EazyBone[/USER] That's what I was thinking until I read Diah's comment about it being a non-trivial task with OLEDs... It sounds like there may be data...Leave a comment:
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