Vizio VO47lfhdtv30a Scrolling/Flickering Screen

[budm]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

So it looks like it is missing the heat transfer pad?

[seanotron]

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?

[seanotron]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

For example, would something like this work?

http://www.ebay.com/itm/TO-220-SIZE-...5#ht_322wt_169

Or this

http://www.alibaba.com/product-gs/47...heat_sink.html

[tom66]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

The second link is what you are looking for.

I'll check and see if I have any lying around - I'll send it to you for price of postage if you are interested.

[seanotron]

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?

[melofin28]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

I am having a similar problem with my Vizio VO47Lfhdtv30A. At random times when turned on the screen will go completely red. When the cable is on all of the black areas of the screen will have flickering red lines running through it and once I turn the cable off the whole screen is red or flickering red. I have some pictures that I will post of this happening. I have taken it in to a local TV repair shop and had them unplug the LVDS cables from the T-Con, clean them off and reconnect back to it. After doing this it worked for about 2 weeks with no problems then it gradually started to flicker red again.

I have ordered a new T-Con for 30$ off of Ebay and new LVDS cables from Vizparts and plan to have them both installed. I bought this TV used from a repair shop about two months ago. It also has a loud buzzing noise when it is turned on. Everything else has worked fine to my knowledge. I will post pictures of my new T-Con once I receive it in the mail. Any help or comments on my situation would be appreciated.

[sgeorge]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

did it ever occour to you the panel is bad. seen lots of them. sorry for the news. steve

[tom66]

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?

I would think that it might be okay if you get a heat pad on it soon, it might just be going funky because of the lack of heatsinking. In other words, suck it and see. No luck with heat pad here unfortunately.

[budm]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

You can try using old heat sink from old computer and superglue (I used GEL type) to the IC, run it without the metal shield.
See example here:
http://s807.photobucket.com/albums/y...%20LTV-32W3HD/

[melofin28]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

did it ever occour to you the panel is bad. seen lots of them. sorry for the news. steve

Yes, a bad panel was what I had thought at first aswell. The reason I question this was because I had read online of similar cases and it being a T-con or LVDS issue. So I gave it a shot and like I said before it worked fine after disconnecting/reconnecting and cleaning the LVDS cables for a little over two weeks which led me to believe it may just be a bad T-Con/LVDS or just a bad connection between the two.

[budm]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

Most TV manufacturers do not even know 100% for sure if it is the T-CON or LCD panel problem.
That is one reason to be at badcaps.net since you can try to find out if other people taht had the same probklem as yours, and how they fixed the problem.

[seanotron]

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 wrong beyond the T-con.

[seanotron]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

You can try using old heat sink from old computer and superglue (I used GEL type) to the IC, run it without the metal shield.
See example here:
http://s807.photobucket.com/albums/y...%20LTV-32W3HD/

I don't think that would work in my situation unfortunately, since there's very limited room where the T-con is located.

[cashkennedy]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

in regards to melofin28's problem >

you maybe should have started a seperate thread about this as it appears to be a different problem. If your are only getting this extra marks on the black area around the cable / and on menus / error screens then it is not the panel or the tcon.

The panel and tcon can not interpret the difference between black parts of a movie (like a dark / night time scene) and the black box around the incoming cable signal. So if dark scenese in movies do not have the extra red then your issue is with the mainboard.

(On some channels the black box is addded by your TV to fit the content to your tv, on other channels the black box is added by the TV station so that the content will be shaped correctly on old 4:3 tv's and newer widescreen tvs)

[melofin28]

Re: Vizio VO47lfhdtv30a Scrolling/Flickering Screen

It does it with movies aswell. We also have noticed it while streaming netflix. I just got the new T-Con/LVDS for it in this morning so im going to try and install it and ill have an update as soon as I can. I'll add some new pictures too once i get the old Tcon out. Thanks for your reply