Magnovox 32MD359B LCD TV - White screen only

[Flinix]

I have here the TV model posted as the title that I found at the side of the road. The TV turns on and comes to a blank white screen. I have no way of testing for sound as I do not know how to change the input to something with sound (say static on CATV or sound from HDMI input)

With the TV apart and on, you can hear a high voltage like noise coming from the inverter board. I don't know if that noise is normal as it is fairly noticeable if you are looking at the back while it is on.

There is a moderately gray border all the way around with rounded corners at the corners of the screen. This grey boarder grows with time to about a maximum of one inch all the way around (time frame given about 20 minutes). I assume this is related to temperature as to it grows in border size as it warms up.

I do not own a multimeter, so I can not test for resistance or voltage.

Pictures of both the screen while on and the back showing the mounted boards are attached. I can't find my camera right now, so I used my webcam to capture the images. Once I find my camera, I'll upload nice visible pictures.

I have checked all the boards on the TV and I have found no visible blown caps. I have experience replacing capacitors with computers and LCD screens in the past, so if there is one I need to replace regardless of this, that won't be a problem.

I have looked for the price of the power board online and I do not mind purchasing the replacement if required, given the price is pretty cheap for this board.

Feel free to reply to the thread or send me a PM. Thanks

[budm]

Re: Magnovox 32MD359B LCD TV - White screen only

We need to check and see if we have voltage at the fuse of the T-CON board. We need better pictures of all the board so we can see how they are connected together, the T-CON will be under the metal shield at the top center of the LCD panel assembly.

[gilly1984]

Re: Magnovox 32MD359B LCD TV - White screen only

Did you take those pictures on a nokia 6230?

Without a multimeter you are going to struggle.

Fashion up a little bulb to a 1.5v aa battery, split the wire and use the fuse on the tcon to complete the circuit. If the bulb lights up the fuse is ok.

Make sure its unplugged though, dont want the battery exploding on you.

[Flinix]

Re: Magnovox 32MD359B LCD TV - White screen only

We need to check and see if we have voltage at the fuse of the T-CON board. We need better pictures of all the board so we can see how they are connected together, the T-CON will be under the metal shield at the top center of the LCD panel assembly.

Well I've yet to still find my camera, but here is another thread with the same exact TV with decent pictures. For now, I hope this helps. https://www.badcaps.net/forum/showthread.php?t=22724

An another note, the only fuse in obvious site appears to be fine. That fuse is located on the power board. I haven't looked under the metal shield near the top center of the LCD panel for the fuse you are talking about.

Will be looking for that now. Thank you for your quick replies.

Did you take those pictures on a nokia 6230?

Very funny XP. It's the best I can do photo-wise for now. The webcam was the internal can from a Dell Studio 1737.

[budm]

Re: Magnovox 32MD359B LCD TV - White screen only

Sorry, that thread is over 160 posts long! Not going to read that. The fuse on the T-CON is surface mounted and you cannot see it until you remove the shield. We need to see how many boards you have on this TV.

[gilly1984]

Re: Magnovox 32MD359B LCD TV - White screen only

It should look something like this.

F101

Your tcon will be different, this is just to show you how the fuse will look.

[Flinix]

Re: Magnovox 32MD359B LCD TV - White screen only

Sorry, that thread is over 160 posts long! Not going to read that. The fuse on the T-CON is surface mounted and you cannot see it until you remove the shield. We need to see how many boards you have on this TV.

Though the thread is 160+ posts long, the pictures requested are on the first page.

As for number of boards, I count 5, not including the built-in DVD drive.
1 power board, 1 inverter board, 2 very long and skinny boards that are on the immediate bottom which are cable bridged together and the T-CON board. Looking for the fuse now.

[budm]

Re: Magnovox 32MD359B LCD TV - White screen only

One thing about TV is that you can have the same model with different boards, screen used inside the same model, depends on who is making that TV.
Your screen may use one of those non-replaceable T-CON board, it may be built-in into the panel.

[Flinix]

Re: Magnovox 32MD359B LCD TV - White screen only

Well that is definitely true. Everything looked exactly the same between the other thread's and mine, but then again, I couldn't see the T-COM board either.

Not I've attached a new image of what I hope is the T-COM board. If you could confirm that with me, I'd appreciate that. While I was sitting here, I looked furiously for something that looked like a fuse. I couldn't find anything marked with an F#### to indicate the fuse, but just a hunk ton of C####'s, R####'s, and a couple oddball ones like IC####. Replace "####" with the part piece ID of coarse.

[gilly1984]

Re: Magnovox 32MD359B LCD TV - White screen only

It would seem that is indeed the tcon board, i googled ba94f0g0401 1.

Strange that it has inputs on it.

[Flinix]

Re: Magnovox 32MD359B LCD TV - White screen only

The connector at the center left leads goes to one of the long skinny boards on the bottom side of the LCD panel. The other three connect directly to the power supply board. I don't know if that will help you any. Thank you for sticking with me on this.

And yes, Google is your friend, though I already exhausted Google trying to figure out what could be the "cause" of the problem I have.

[budm]

Re: Magnovox 32MD359B LCD TV - White screen only

That is the main board, can you take the picture that shows the flat ribbon cable from the main connected to the LCD panel? I have a feeling the LCD panel you have does not have replaceable T-CON board, same setup as LCD monitor to save money.

[Flinix]

Re: Magnovox 32MD359B LCD TV - White screen only

According to online resources, the board I took a picture of is in fact the T-CON board. Also, I am not home at this current time and will not be home for another 4 hours. If there is anything to request picture-wise from now til I get home, let me know so I can add it to the to-take-picture-of list.

[budm]

Re: Magnovox 32MD359B LCD TV - White screen only

http://www.shopjimmy.com/magnavox-a9...l-main-cba.htm
Strange to have T-CON board with USB and HDMI input, and cannot see any fuse on it either.
The small ribbon cable to the screen seems to be too small to carry all the signals.

[Flinix]

Re: Magnovox 32MD359B LCD TV - White screen only

Yep, I actually just ordered that board earlier today. I love shopjimmy for their good prices. I don't know if it will fix the issue, but if that board was the problem, I would assume it would.

When it comes in and I reassemble the TV with the new board, I'll let ya'll know how it turned out.

Up til now, thank you.

EDIT: Just in the instance that this works out fine, I ordered a female VGA jack to solder to the board where a socket to solder it to exists. Will it work just from connecting the jack or is there a couple extra components that I'll need to add to make the jack function? Let me know, thanks.