A pic just to display how I had each half disconnected. Thanks again for all your help.
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paqman
Member
"Dropped out of Electrical Engineering for telecom degree, because electronics is all magic to me. But I am a cheap DIY'er so I still dabble"
Last Activity: 04-17-2024, 12:22 PM
Joined: 03-02-2024
Location: UT
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Ok I finally got around to doing this. I removed one half of each of those cables on each side of the TV. I turned the TV on each time. Voltages on the pins all looked normal. TCON was not ever powered on. And the led never came on.
A pic just to display how I had each half disconnected. Thanks again for all your help.
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Thank you that makes sense. Ok here are some photos of the panel boards along the bottom. They may not be in the exact same order they were taken. Hopefully I got them close enough you can see them clearly. Thanks again.
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[ATTACH=JSON]{"data-align":"none","data-size":"small","data-attachmentid":3232345}[/ATTACH]...Leave a comment:
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That's ok I understand. It just takes a while to get that torn down to that point and not a great way to support the TV while I'm doing it, and I am having a hard time finding the time to tear it down that far. I will try.
But I still have one question. And this may just be me not understanding how it works. Why is it that the pins 1-4 on CN202 only have 12v when we tie pin 15 on CN201 to get power form pin 3? Shouldn't those pins get power any time the TV is on? If not, when should we expect those pins on CN202 to have power under normal operation?...Leave a comment:
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Sorry I'm not sure what you mean. There is nothing behind the speakers. I removed the gray plastic bezelthat goes all the way around the back of the tv, and then was able to get the black metal cover that also goes all the way around the TV pulled down enough to check all the boards and ribbon wires on the bottom of the TV. This metal cover had a few strips of metal tape protecting some connectors. Had to carefully cut that tape to be able to pull that metal cover down to see the boards and ribbon connectors....Leave a comment:
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Well I couldn't really get any good pics because I didn't get the entire bezel off. But all the boards under there look really good, all the ribbon cables seem to be fully seated....Leave a comment:
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Ha oh gotcha. Alrighty I'll get to that tonight. Hey I haven't said thank you yet for helping me through all this. I really appreciate it.
...Leave a comment:
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Ok those both look fine to me.
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[ATTACH=JSON]{"data-align":"none","data-size":"small","data-attachmentid":3230101}[/ATTACH]Ok those both look fine to me.
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Sorry, which ones are the panel buffer boards? Not familiar with that name....Leave a comment:
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Took the PS board off, the back looks good to me. No real solder cracks, burn marks, or other issues that I could see....Leave a comment:
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OK so I didn't pay attention to some of that stuff on the last test, so I did it again. Interesting note, the screen cam on this time! But intermittently. It didn't stay on the whole time. And when I unplugged and tried again, it came on again. But again it is not consistent. And most of the time it won't come on. When it does, the right side of the screen is white fuzzy, the left shows normal image, so I am able to use the remote and change inputs and change volume, etc.
As for the test, here are the voltages I measured:
CN201 (PS to main board)
1 (NC) 0v...Leave a comment:
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OK I reconnected everything, removed pin 15 from the CN201, connect 1KR from pin 3 to pin 15, and powered the TV on, and still the BL does not come on. I do see 12v at pins 1-4 on CN202, which is strange to me. But I'm probably getting ahead of things there.
I also tried removing one of the two screen ribbons from the TCON at a time. Never got any BL....Leave a comment:
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Is there a trick to pulling this wire out of the socket? I don't want to damage the connector.
Edit: I got it. Was able to pry the little tab in the back up enough to get it out....Leave a comment:
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Sorry for the weird arrangement of pictures. (on mobile) In the one you can see how I connected the 1K resistors from pin 2 to 3, and from pin 2 to 15.
And...Leave a comment:
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OK I think I get what you're wanting here, but a bit confused about how you want the 1k resistor hooked up. You're saying on CN201, I should connect it from pin 2 to pin 3 AND pin 15?
So pin 2 ----- 1KR ----- to pin 3
And
Pin 2 ----- 1KR ----- to pin 15?...Leave a comment:
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I'm assuming you mean CN201, which is the connector going to the main board. I don't have a CN101.
Anyway, I did as you said, I disconnected all three sockets, and plugged in the TV. I see voltage on three pins, as expected:
CN201 (to main board)
Pin 2 - 3.9v
Pin 8 - 12v
Pin 9 - 12v
And I see no power to any pins on either CN301 (to LED controller) or CN202 (to TCON)...Leave a comment:
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Sorry I maybe still didn't explain well enough. Both times I was testing those connections, the TV was powered on, not on standby. And most of the time I don't see 12v on them like I should. The only time I did see the 12v on the power board connections to the TCON (CN202), it so happened that was the time when I noticed the TV screen actually had an image on it. (half white fuzzy, the other half normal.)
So what I'm saying is that it seems like that something on the PS board that sends power to that CN202 TCON connector seems to be faulty.
Which is annoying because...Leave a comment:
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I will definitely try this thanks!
Although I will say I misspoke in my original post. Because the TCON connector on the power supply board (CN202) also shows no voltage when the connector is disconnected, I think that would indicate a problem on the power supply board, not the TCON board.
Regardless, your suggestion is easy and I will definitely try it....Leave a comment:
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Sorry, my bad. I edited the original post and added some pics. Thanks!...Leave a comment:
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Vizio M60-C3 black screen
So our beloved M60-C3 up and died the other day. I was not there, my wife mentioned that it came on, displayed the logo, then showed the right half of the screen white and fuzzy, with the left half of the screen ok. However when I got around to looking at it, the screen would not come on at all. The indicator LED will come on, then dim a bit. After a while, the LED might blink a bunch of times. I can't get it to be consistent to do that.
So I've got the back off and am checking voltages. The capacitors on the power supply board visually check out. No bulges or anything. They all show... -
Hey everyone, Nate here. I'm a Linux admin by trade, but try to fix crap on my own when it breaks. Just here to try to figure out what's going on with my Vizio TV. Thanks!Leave a comment:
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