Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
I don't think that would work in my situation unfortunately, since there's very limited room where the T-con is located....
seanotron
Member
Last Activity: 05-07-2012, 10:17 PM
Joined: 10-27-2011
Location: Arizona
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Well, bad news chaps, I located a heat pad but it did not appear to rectify the problem. It comes and goes, if you leave it on a while after it starts up the lines will sometimes lessen up, but I suspect either this T-con was bad to begin with or it fried after being used for a few weeks without a heat sink/pad. I'm going to see if the place I bought it from will ship me a new one, otherwise it's another $30 for a replacement.
I do feel like this TV gets way too hot for an LCD, I have concerns that there's something...Last edited by seanotron; 05-05-2012, 10:21 PM.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Thanks for the offer Tom, I would definitely appreciate that. I may be able to find one as I have some older displays laying around somewhere, but I will let you know.
Do you think the T-con is permanently damaged?Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
For example, would something like this work?
[url]http://www.ebay.com/itm/TO-220-SIZE-HEAT-TRANSFER-PADS-THERMAL-PAD-50-PIECES-/320881350645?pt=LH_DefaultDomain_0&hash=item4ab604d7f5#ht_322wt_169[/url]
Or this
[url]http://www.alibaba.com/product-gs/471050455/Thermal_material_for_chips_heat_sink.html[/url]Re: Vizio VO47lfhdtv30a Scrolling/Fl...22wt_169[/url]Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
It must be. When I opened it up, no such pad was there. It's possible that the original owner replaced the T-con and somehow forgot the pad, either that or Vizio had a serious design flaw on their hands with this thing.
So now my question is, where can I get a pad or something like it that will accomplish the same thing? And have I already ruined this T-con?Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Yeah, the indentation sits flat on top of that area of the T-con board. I've included a pic of the T-con in place just so it's totally clear.
I've also rechecked the cables, and nothing seems loose or disconnected....Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
So I brought this baby back to my house, and it was not repeating the behavior. I left it on for 6 hours, nothing. Then tonight, it starts up again. Oi. I have a video of what it's doing, hopefully it will show up. I'm thinking this T-con has gone bad or was perhaps bad to start with, but if this is an overheating issue (since there is no pad that sat between the T-con and the shield), I wonder if this will just continue happening.
[url]http://smg.photobucket.com/albums/v622/SleazySean/?action=view¤t=DSCN19241.mp4[/url]...Last edited by seanotron; 04-29-2012, 10:32 PM.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Since I don't have a heat pad, is there a way I could create a makeshift one? Or something that would accomplish the same thing?Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Ahh, well that might explain my problem, there was no such part. The T-con just sat straight on the frame with the heat shield over it. Here are pics of the setup.
Also: I notice that on the bottom of the T-con it looks like some solder has possibly melted. There were 5 silver bubbles on the bottom when I installed it, and now I notice one is gone. I've included a photo of that as well....Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
When you say the heat-pad, do you mean the velvet-y tape that fits around the metal shield? Basically, I put everything back exactly as it was before the failure. It actually only lasted about 10 days, the replacement was on the 13th and my friend said this started a few days before he called me (apparently he hoped it would just go away).
In terms of the LVDS cable, is there any way that the previous failed board could damage that? It seems strange that it might fail such a short time after the replacement.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Well, so much for that. My friend called me today and said the TV was acting up again. I went over, and now it has lines that pop up from time to time. I feel like I just can't win with this thing. I would assume the new T-con is having a problem, but this is completely different from the original problem. It more closely resembles (based on what I've seen) a failing LCD screen, which I'm really hoping isn't the case as that's obviously going to be bad news for my friend.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
UPDATE: I ordered a new t-con and received it yesterday. The TV is now working great. I've had it on for over 6 hours, and it shows no signs of the scrolling problem. I did take note when I removed the old t-con board, I compared it to the new board and it looked as if the solder underneath one of the smaller chips was completely gone. I suspect this is where things went haywire.
At any rate, wanted to thank you for the good advice, Tom.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Yeah, I found one for $30 on Ebay that's supposedly been tested (we'll see about that). I don't mind such a small investment. In terms of the replacement board I purchased, I'm definitely returning that and assuming its got issues of its own, since it failed immediately.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Sorry Tom, I think I misunderstood what you were originally asking. The menus are definitely affected by the skittering/jumping on screen. They can still be pulled up, but they're nearly impossible to see because of the scrambling effect. But if you're just on an empty input that isn't connecting to anything, the blue 'No Input' screen does not skitter and jump....Last edited by seanotron; 04-06-2012, 04:09 PM.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
The boards are identical except for the last two digits:
My board # 3647-0152-0150 (2F)
Replacement board # 3647-0152-0150 (2H)
The general part # is 0171-2272-2782
The serial numbers match, and per the product page the 2H board is a valid replacement in this set for the 2F board. The boards themselves are identical, same fit, same capacitors, etc....Last edited by seanotron; 04-06-2012, 04:03 PM.Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Oh boy, well as if this situation could not get any worse, now that I've put the old board back in I'm hearing a buzzing sound from the power supply. I really don't remember hearing this before, and now the skipping/dancing/scrambling seems to be affecting the blue screen as well, which it did not appear to be doing before. I'm also seeing some white lines in the left hand side of the screen, about an inch and a half to two inches wide, all the way from the bottom to the top, as if there's some kind of interference happening....Leave a comment:
-
Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Tom, the menus/volume don't appear affected. I can still pull up the menu, though the screen gets worse when I do, almost totally blacking out. But I can still see that it's popping up.
The T-con was going to be my next question. I see they aren't terribly high on the resale market, so at least I won't be in too deep if that's the issue.Leave a comment:
-
Vizio VO47lfhdtv30a Scrolling/Flickering Screen
Okay, so a friend of mine was given this Vizio LCD TV for free. I've fixed a few TVs here and there, so I told him I would give it a try as he didn't have the money that the local repair shops were asking for to get it running again. This was clearly a mistake on my part
So here's the situation: The TV has a very bright picture. It turns off and on just fine. The problem arises when it has been on for an hour or more. The picture will begin to scroll or scramble (this was difficult to capture on film so I'll just try to describe it as best I can). Basically, the picture 'jumps'... -
Re: VIZIO P42HDTV10A No picture, powers off after 10 seconds
I do have a multimeter, though I can't lay claim to being an expert user. I know the basics, how important it is to have good grounding, etc.
I should add that I tried unplugging both Y and Z boards, and it still follows the same pattern, only that none of the four LED light indicators come on. I don't know if that provides any useful information, but there it is.Leave a comment:
-
Re: VIZIO P42HDTV10A No picture, powers off after 10 seconds
It clicks when it is plugged in, and then clicks if you turn it on, and again when it shuts itself off, but I had figured those were 'normal' power clicks.Leave a comment:
No activity results to display
Leave a comment: