Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

[Storyteller12]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

This is short lived. Baking is not a permanent fix and will last a few hrs to a few weeks if your lucky.

[Philly Cheese Steak]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Hey guys thought id chime in,
I got this set for free from my friend was gonna toss it out less then a year old, 50" Vizio 4K UHD model number D50u-D1 V series Smart TV. I have done the oven bake trick to the X box and a few GPU'S Ive had, so Today I found this(wasn't about to read it all). So I opened mine up nothing to lose, took about an hour to get the heat sinks off it and clean off the TIM'S(all dried up). Cooked it at 400 for 11 minute's, put it out side to cool it off, new thermal paste applied boom started right up to the Vizio logo.
Working, less then a year old 50" 4K UHD Smart TV. CHEERS! GUYS!!!

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

I would say that maybe you should try to bake it again for a little longer. I would try 11-12 minutes at 385 degrees. Make sure you keep it elevated off the oven rack or pan. I just roll up 4 balls of aluminum foil and place them underneath the four corners of the board so that the whole thing sits up about an inch off of a baking pan that I have underneath.

[ajsterr4]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Hey just wondering if the eeprom chip replacement on the main board solved issues as a permanent solution? I have a P65-E1 and put the main board in the oven for about 8 mins and the TV works now but only for a few minutes at a time. I even put a few fans with the back cover off to see if cooler temp would help but no avail.

How can one repair this main board if you can't find a replacement part?

[Nick's Tvs]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

KCA,

Sorry for the spotty responses, I don't always check bad caps daily and sometimes when it gets busy a month or two can go by.
Glad to hear you got your set back up and running.
We were able to fix close to 100 sets of P552ui-B2 an P652ui-B2 by doing main board repairs, and can also confirm that so far not a single one of the sets had panel issues.

The set may sometimes look to be a bad panel, however that will not be the case with these 2 models. They seem to be well designed and not fail. One way to do a quick check/confirm is to disconnect the TV from power, heat up the processor chips located underneath the heatsinks, (don't need to remove heatsinks) and to power it back on. If it allows your set to properly display the picture temporarily, then you have confirmed your main board is the issue. If the picture didn't come back or if the lines are still present however, it is entirely possible you did not heat up the chip enough or that the failure is severe enough that heating up won't be enough to allow the board to temporarily work.
These heatsinks are big so we will heat up the chips for about 30 seconds a piece with the heatsink attached. If that doesn't do it the first time, we repeat the process for another 20 seconds.

A bad main board can manifest itself as vertical lines on half or all of the screen. This is still a main board failure even though most often with other TV's that is usually a panel related failure.
Don't throw these TV's out because you think it's a bad panel, replace the main board first or fix it!

[Toddo]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Two hours, but it was a fascinating read yes?!?

Glad the post helped you to fix yours. Is it still up and running?

~ kca

Glad you asked. As a matter of fact, the Vizio had trouble free operation for only about 5 hours total over a couple of days. Then it started having "glitches". First the picture went out, with sound still, but this time is was not totally black, but the whole screen looked like "blooming" if you know what blooming is on a uhdtv. Well, I thought it was hopefully just a one time hiccup, but not to be. Then the next day the screen froze. The image froze on the screen, and the tv would not turn off. I had to unplug the tv then plug it back in. Screen freezes started getting more frequent over the next several days. Then the tv started turning itself off and back on. I turned off CEL or CEO or whatever it is in the tv settings but it did not fix that. Then one day I got horizontal bars across the entire screen. More glitches, etc. But.. every time these things happened and I unpluged the tv then pluged it back in the picture comes up perfect everytime.

To me, this does actually seem like it may be a corrupt memory problem with the eeprom. I ordered an eeprom for the set from ShopJimmy. I didn't check with them to make sure the thing is pre-programmed. It better be pre-programmed. I got it in the mail today. I plan on replacing it this Sunday.

The thing about this TV is this, I really wanna save this TV. I could buy another 50" UHD TV for like $500 no problem really, but the Vizio I have right now is perfect. It's got 5.. read 5... HDMI ports, all of which I have been using with 5 devices that need an HDMI port. It's got a component port, which I also have something hooked into that. It's got an analogue audio output, which I did use a lot in the past for hooking the TV up to my old cabinet stereo system. You can't even get a new TV these days with 5 HDMI ports, only 4 max, most selling with only 3 HDMI ports. And NO current new TV's have component ports, and deff no analogue audio out. Yeah, you can get a powered HDMI hub switch and plug all your HDMI cables into the HUB and switch them, but it's a PITA. Same for the component port and the analogue audio out. But that's more and more crap to hook up and have laying around everywhere. And before I bought this TV I researched LED lit tvs and got this one because it has FULL ARRAY LED lighting and not "edge lit". I saw so many edge lit TV's on display that had clouding in the corners of the TV screen. A full array lit LED set is lit from corner to corner, edge to edge, like a TV screen should be. No crappy clouded corners on the screen. I don't know if you can even get full array back lit LED TV's anymore. This TV had an awesome picture, best picture of any TV I ever owned in my life, AND everything I needed for ports and hookups. This is why I want to save this TV. I would be willing to pay up to like $200 to have the thing fixed rather than get a new one that I"m not totally happy with. So that's my thing with this TV.

One last thing. If I do wind up getting a new "smart" TV I will not be connecting it to the internet. I got a suspicion that the Chinese TV manufacturers could be sabotaging their own TV's with "updates" to "retire" them and make you buy a new one. And if you do buy a new one of a different brand, you will not be punishing the manufacturer of your old TV by buying a different brand for your new TV. ALL brands are made in communist China. All the funds from TV sales are enriching the communist govt of China, no matter which brand you buy. The ChiComs got a lock on the monopoly.

BTW, how about yours? How long did your baked board last?

[overflo]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Curious if the OP's unit is still functioning. I do microsoldering and motherboard repair on other devices as my profession. Have repaired many TVs but this one had me stumped. I know “baking” boards has served as a temporary fix for different mobo's in the past but most of those repairs were short lived. I currently have a p602ui-b3 with the same symptoms. I've replaced a few bad caps on the power supply but still no picture just a blinking light. Mobo's Optical port is lit up during the power cycles and the original owner stated that half of the screen went white/fuzzy and shortly after the unit powered off. I get the fading power light followed by 16 blinks. Same as the OP. Just trying to bring this thing back to life but as others have found there isn't much info on these models out there.

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Two hours, but it was a fascinating read yes?!?

Glad the post helped you to fix yours. Is it still up and running?

~ kca

[Toddo]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

I have a Vizio 50" P502ui-B1E with the same symptoms as the OP. I bought this TV brand new in 6/2015 for $750 (HD TV's were just coming out at that time and were kind of expensive). So almost exactly 5 years went by before it crapped out. I was on my PC a couple days ago and the screen went flakey with nothing but multicolored very thin vertical lines all the way across the screen and then about a minute later the screen just went black. I watched a ShopJimmy Youtube video on how to check the power supply standby voltage and checked the voltage and it showed no voltage at the standby pin. But, looking at the mainboard connector and the standby pin, there was no wire coming into the back of the connector where the stanby pin is on the other side. Confusing. The two red wires adjacent to the standby pin both read 12v like they're supposed to, but.. not wire going to the standby pin.



Anyway, since I got no voltage at the standby pin (cause there's no freakin wire going to it I guess) both with the mainboard connector plugged in AND with it unplugged, I figured I had a bad power supply like the ShopJimmy video said. So, I was all set to order a PS with one in the shopping cart and everything but I kept thinking about how some people on youtube that had cooked their mainboard to fix it were getting sound but a just a blank screen. I didn't know if if mine was still outputting sound really as the thing crapped out when I was on my PC and I wasn't doing anything on the computer that made sound. So I figured I better check to see if I had sound and low and behold it was outputting sound. But kind of like intermitantly like the OP's symptoms. Actually exactly like the OP's problem.

Well I read this whole thread for like 2 hours. Every post for like 7 pages to see how he fixed it. Get all the way to the end and he says he cooked the mainboard like the people in the Youtube videos. So the thing wasn't working anyway so what did I have to loose. I cooked the mainboard at 400 degrees for 11 minutes. Everybody says 10 minutes and but one guy said 12 minutes so I went in between. Well it fixed the TV haha. I'm typing on my PC right now with the Vizio P502ui-B1E as my monitor. It re-flowed the solder and reconnected whatever solder connection had cracked. Fixed for absolutely free. Can't get any better than that.

I hope it lasts a long time. If it doesn't at least I know what's wrong with the TV and that I need to get a mainboard for it and I won't have to do a bunch of troubleshooting. Just hope I wind up buying one that's not bad like so many other people do. Bunch of crooks selling those bad boards I guess.

I got an old Xbox 360 that got RRD about 8 years ago that's just been sitting there. We bought that thing like back in 2005 or something. Tons of people everywhere said they cooked the board on those consoles back then and it fixed it but I was always super skeptical. I think I might take that thing apart and cook it and see if it fixes that old thing. I got tons of games for it.

Oh yeah one other thing I wanna mention. I had a real hard time getting the ribbon cable stay out of the connector to get the cable out on the mainboard. It seemed like it was glued in there or something. The thing actually broke apart and I had to get my supermagifying head rig on and pick all the pieces outta the connector with an exacto knife being super carefull not to bend any of the pins. But it still screwed up about four leads on one side of the ribbon cable pulling the cable out with the broken stay up in there. So then I had to cut about a mm or so off the end of the ribbon cable to get solid leads again. But then, I didn't have another plastic stay to wedge back into the connector to clamp the cable down cause the original got all busted up. So I used the stay outta the unused connector right beside it. But it wasn't as long as the original one but I evened it up as best I could and jammed it in there and so it's working ok cause the TV is up and running. So, I think I know how some of those ribbon cables got messed up like the OP was dealing with.

[nomoresonys]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

@weebles, looks like somebody sold you a bad mainboard too, hope you got a refund.

[weebles]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

yeah so.. I had this same exact issue. I ended up replacing all four boards (PSU, Mainboard, LED Driver and Tcon and still no luck. I was furious and threw that mf'in mainboard in the oven at 380 for 10 min and then cooled it, installed it and the damn thing worked. Incredible.

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Well, I wouldn't say they are off of my list. They are very cooperative folks and have been willing to work with me on every count. So far so good. This particular board may have been damaged in the shipping process. It wasn't bubble wrapped well and the heat sink that extends over the sides of the boards should have been taken off and wrapped separately. I let them know about this. They are refunding my monies for this board, although I am going to have to contact them tomorrow and see why it hasn't been processed quite yet. I sent it back to them on December 22nd.

[nomoresonys]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Ok, so looks like tvpartstoday sold you a bad mainboard, don't think I'll be doing business with them if they are selling junk represented as good.

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Fixed it.

Ended up baking the Main Board in the oven at 380 degrees for 10 minutes. As a result, the set displayed an entirely full picture and all the LED stayed on for as long as the set was powered on. Hours and hours of trouble-free operation. No more cycling on and off. No more 1/2 picture.

Like brand new.

If you are having issues similar to the ones I have outlined in this thread, bake the board (which reflows all of the solder in a uniform manner) and your problem(s) will very likely be resolved.

~ kca

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Working on it a bit again this morning, and something just happened that I do not believe has ever happened before. With the original Main Board back in (because I am getting nothing productive from the replacement Main Board), the backlights lit up not only once but twice in relative succession. Came one for about a minute, then went off for about 4 or 5 minutes, then came back on AGAIN.

I don't think this has ever occurred in the past without my having to unplug the AC power in between "lightings".

Also, the entire screen was flickering rather wildly upon the second lighting of the LED's. I think that did happen briefly once before about two weeks ago. Not sure what that is all about.

When the LED's were on today, I quickly measured the voltages on the Main Board connectors (see pictures below) where they head out to the large, white ribbon cables and then down to the T-Con, and I was also able to measure the T-Con connectors where these same large, white ribbon cables enter.

As expected, when the correct picture appears on the left side of the screen the voltage is present on that particular large, white cable BOTH at the Main Board Connector and the subsequent T-Con connector. It read 11.7. Pretty sure it's a 12v line so that was okay. Of course, it almost had to be in order to produce the 1/2 picture that is, essentially, flawless.

Note: There are correct voltages coming off of the Power Supply Unit and heading into the LED Driver Board, so those two do not appear to be related to the problem in any way, shape or form.


Now, here's the telltale sign:

The other large, white ribbon cable and its two connectors did not have any such 11.7 reading, again as expected. But what pretty much gives this scenario away is that even though all of the LED lights across the entire set lit up, there is NO VOLTAGE READING on ANY OF THE CONNECTOR PINS on the MAIN BOARD where that silver connector leads out to the T-Con.


So, in short (no pun intended), I think that pretty much proves once and for all that the problem lies within the Main Board itself and, in particular, only with the circuitry that leads to and controls the upper, silver connector. Because there is no voltage being applied there, no signal is being sent to the T-Con. This, of course, produces the 1/2 screen of white, pink and green fuzz.


All of this is what I reasoned a couple weeks ago, with the help and advice of Nick from Nick's TV. The replacement board was supposed to remedy all of this. But, as you might suspect from all of my previous posts, when I ran the same silver connector voltage tests on this board this morning as confirmation, I get NOTHING on the voltage reads on either silver connector. Keep in mind that this replacement board does not produce the LED lights at all (have tried it over 40 or 50 times), and so it has a fault that precedes the large, white ribbon connectors. Hence, no voltage ever gets to either of these connectors (apparently) and no picture is ever produced .... and that's why I am sending it back for the refund.

~~~~~~~~~

In summary, when the LED's do light up and the original Main Board is in, there are correct voltage readings on ONLY the Main Board and T-Con Board connectors that control the good 1/2 of the picture.

The key point is that even though these LED's are fully lit, the other silver connector on the Main Board (the upper one) reads NO VOLTAGE. Therefore, it's pretty safe to conclude that the Main Board is faulty.

The only other possible (and very slight) explanation I can think of is that the T-con is faulty ~ only on its left-hand side ~ and is somehow sending a signal in backward fashion to that particular silver upper Main Board connector and denying a voltage reading there. I really don't think that is even possible, but someone can correct me if I am wrong.

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Hey Nick ~

Wondering what would be involved if I were to send the board to you for diagnosis and repair? What are the costs involved?

I'm not completely convinced that the core problem is the main board, but it is still the most likely suspect and the board I got from this retailer a couple of weeks ago has not worked at all and is therefore rather useless in my own assessment of the issues going on here. So, I'll be sending that one back for a refund. But I am contemplating sending my original one to you.

Do I just pay the shipping cost to get it to you and then pay you only if you find it is defective? Do I owe you anything if you find it is not defective? Please fill me in on what I need to know in relation to this path and then I'll be able to decide what the best course of action is.

Thanks ~

kca

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Just wondering if anyone out there has any more ideas on this Vizio P652ui-B2 and how it continues to cycle on and off.

My last post details where I still am with it.


Is the cycling on and off resolvable independent of the 1/2 picture? In other words, is something causing the cycling on/off ...... and something else the root cause of the 1/2 picture?

Or, will they both be solved by tracking down and fixing a singular component (or whole board, if necessary)?

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Well, I got the new main board and put it in but it did not work. In fact, it's quite a bit worse than the original one because now I can't get any video to appear at all and there is no sound either. It does cycle on and off every minute or two, just like before, but nothing else.

It did not help that the board was damaged during shipping, with the upper heat shield bent and, to an extent, broken. But, I simply replaced this with the one from the original and so that was not what I considered a determining factor. Also, one of the aluminum caps was broken off but I just soldered that back into its correct place. Neither one of these things caused the board to go bad, I do not think, but who knows what other components might have been damaged during shipping or not working correctly when it left their distribution center?

So, I put the original back in and got the same results I've been seeing for about 3 weeks. Nothing changed. Having determined that, I put the new one back in a 2nd time and it continues to show no picture at all and no audio whatsoever. Very frustrating.

Hard to tell where that leaves me. If the new main board is indeed bad, there still remains the possibility that it is the only thing that is wrong.

Within the last couple hours, and with the new main board still in, I disconnected everything from the main board except the power from the PSU, and nothing changed. I'd like to say that the continued cycling on and off I still get in this scenario indicates that the main board is indeed bad and therefore the culprit, but it's still very difficult to tell if the cycling on and off also occurs simply because I have disconnected the other boards in this particular experiment (meaning, I disconnected Main Board to T-Con, Main Board to LED Driver Board, and even the Power Supply to LED Driver Board). The same thing happens with the original main board in place in terms of the recurring cycling on and off with all other boards disconnected.

Hope that's enough information for someone to make a further suggestion or suggestions. I'll likely be returning this new main board soon, but I'm going to keep it for another week or two to try to troubleshoot it or troubleshoot the original main board by comparing it to the new one. I should be getting my new capacitance meter soon, so that might help track down any problems or anomalies with the aluminum caps found on these main boards.

I suppose I could order a new LED Driver Board and give that a try. Since a new T-Con a few weeks ago did not change anything, and the new Main Board made things even worse, maybe the replacement of the LED Driver Board will provide a clue or even fix the cycling on and off part of the issue.

It seems to me that I have to track down the fault that is causing this constant power cycling and then deal with the 1/2 picture as a second, or secondary, issue. Perhaps they are one and the same issue, but the only two things left that might allow for that are the:

1) Ribbon cables going from the Main Board to the T-Con (especially the one that causes the defective 1/2 picture)

OR

2) A fault that lies "below" the T-Con and resides on the lower panel board or boards (there are two).

..... but both of these scenarios seem unlikely because the cycling is still occurring when these ribbon cables and everything below them (T-Con and lower panel boards) are DISCONNECTED and therefore functionally out of play.


Nick ~ Since you have so much experience with these, maybe you can educate me a little further on what the power cycling on and off can most likely be attributed to. I would really like to solve that element of this puzzle. Or, anyone else, of course.


Any ideas or thoughts would be appreciated. Thanks.

~ kca

[kca]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

Thanks, Nick. The main board should be in tomorrow (Monday) and I'll update this discussion board with the results.

I'm going to put the 1uF cap in on the lower panel as the initial try. It sounds like the 2.2 uF would probably work as well, but since the old one is reading .94 I'm going to speculate that it was and is a 1uF.

[Nick's Tvs]

Re: Vizio P-Series 4K tv with temporary sound and no picture P652ui-B2

So far no we have not, but then again we see a lot more of the 50" and 55"version than the 65". I don't think we have enough data to really confirm anything but I don't think so.