Re: Vizio P652ui-B2
No voltages listed for the main board, only the power board. I'm unsure what those are supposed to be. I can check the voltages and post on here and maybe they can be deciphered.
Goznu
Member
Last Activity: 12-20-2018, 05:56 PM
Joined: 08-07-2013
Location: Douglas, Wyoming
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Re: Vizio P652ui-B2
The Tcon board only has 6 ribbon cables running to it. The 4 from the panel and 2 from the main board. Nothing coming from the power board.Leave a comment:
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Re: Vizio P652ui-B2
I just checked again. All 5v standby, 12v, 24v, and 32v are all made.Leave a comment:
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Re: Vizio P652ui-B2
I checked all my voltages at the power board and all seemed to be correct. I had the 5v standby and 12 volts and all seemed to be correct connecting to the main board.Leave a comment:
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Re: Vizio P652ui-B2
Oh, and yes, the fuse on the tcon is good. I checked that first thing.Leave a comment:
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Re: Vizio P652ui-B2
I went back and scrounged through my stuff to find the "replacement" main board that was supposedly new from Ebay that I bought last December. That one gives me .135v to the Tcon. I suspected that one was bad but they said it was new. I have had bad luck with main boards for this stupid thing. The original one, I ordered another one, it was bad, then the 55" which kinda worked, and then this one. I know I probably kind of confused you about the boards.Leave a comment:
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Re: Vizio P652ui-B2
Sorry it took so long. It's a pain in the ass to take the stand off and get to the tcon board and doing most of it myself with being an inconvenience to my son to help a little. I hooked everything back up and at no point does the voltage ever get higher than .082 VDC. It drops during the cycle then comes back to .082. I'm guessing main board gives it 12v?Leave a comment:
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Re: Vizio P652ui-B2
I sent it back to the seller on Ebay. He told me that those boards aren't interchangeable. The board number was super hard to read, so I ordered the wrong one, thinking it would work.Leave a comment:
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Re: Vizio P652ui-B2
They are about 1.5 inches long.Leave a comment:
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Re: Vizio P652ui-B2
There are 4. 2 for each side.Leave a comment:
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Re: Vizio P652ui-B2
I am also hooking up a portable blu ray player to this that has a screen built into it. I have tried cycling through the inputs but it doesn't seem to matter. I can hook up to any of the 5 hdmi inputs and 1-4 will make the screen turn off then back on while the tv is cycling. Input #5 does nothing to the screen of my player. Even though I've tried cycling through the inputs, it always stays at 5. Or it appears to stay there. Same response from my player.Leave a comment:
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Re: Vizio P652ui-B2
I only had backlighting last year when I replaced the main board with a board from a 55" same type model. I thought it was the same number and interchangeable. That is the only time that I had backlighting. After going through it again this time around, nothing has really changed. I think I did read that a while back that if there is a problem with the panel that it could do just that, take out the tcon.Leave a comment:
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Re: Vizio P652ui-B2
When I disconnected the panel from the tcon on the left side, I removed both small ribbon cables. I put those back in and just took out the ribbon cables on the right side. Still no change.Leave a comment:
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Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2
I have an idea. It may help you or me or both. But, if you get me your address, I can send my boards to you so you can further diagnose, maybe, and possibly get yours working. In turn, if you get it working, verify that mine may be good or bad. We would be just out the shipping back and forth. Sound like an idea?Leave a comment:
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Re: Vizio P652ui-B2
I disconnected the panel to tcon on left side and no change to anything. Still doing the same thing it has always done.Leave a comment:
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Re: Vizio P652ui-B2
I'm still struggling with it. I get back to it every few months. I did find a supposedly new main board on eBay and that didn't change a thing. I didn't really want to do this, but I think I'm down to checking the LEDs. I guess I could have had a bad main board from Ebay and that could be the problem all along, but they are hard to come by. It is kind of odd that when I used the wrong main board from a 55" that I got backlights and a very blurry image in the middle, which I believe was the Vizio logo. But since I had the wrong board, I haven't been able...Leave a comment:
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Re: Vizio P652ui-B2
It appears that I may have the wrong main board after all. I misread a digit on the main board, so I guess I'm back to square one. The tv will get stuck in a loop of turning itself off and on numerous times. I don't have backlights or an image, but I do have audio while it is in the brief on state. The CN2003 connector has zero volts on every wire at that connector. This connector goes from the main board to the LED driver board. I have been trying to find a replacement board, but that is very, very hard to come by, so I may have to try to fix this on a component...Leave a comment:
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Re: Vizio P652ui-B2
I would think that the LED driver board in the top middle would be for backlights and thats it. Through each of the fuses (8), I read 33 volts and I would guess that's what it's supposed to be. From everything that I have noticed, it seems like the main board and t-con board are responsible for the actual image, unless the panel happened to go out. Am I wrong?Leave a comment:
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Re: Vizio P652ui-B2
After scratching my head on this, it seems like t would have to be the main board. I believe I did the T-con diagnosis properly to signify that the panel was still good. All voltages off PS board are good and i think that's all that I am left with.Leave a comment:
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Re: Vizio P652ui-B2
Posting 2 more pics....Leave a comment:
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