Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

[TubeJunkie]

Hello. I have a Toshiba HT551U LCD TV. It has red color. And perfectly spaced vertical lines. I've pulled all board to look For bulging capacitors. Didn't find any. The caps all look good. Also checked for bad solder joints. Didn't find any. Could my problem be the T-Con board? Or Video board. Inverter boards? Thanks

[yohnsee]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Hello.
As you listed almost every board in the tv, yes, one of them may be faulty.
But to write here something helpful also:
Can you make a photo of the back side of the TV? Or post the board numbers.
If every function is okay, only the picture has weird colors/tones, I would first say T-con. Rarely it can be the bonds to the LCD, but for now, let's hope for the best.
But to troubleshoot that over the forum, you have to make a few pictures of the backside. Is the t-con integrated on the motherboard? Or is is a separate board? Does it have 2 ribbon cables running to the LCD? If so, try to switch on the tv with only one of them connected at a time. Then write here, what changed.
Cheers, Janos

[TubeJunkie]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Hi yohnsee . Thanks for chiming in. I've attached more pics. My T-con board is removable. It has 4 ribbon cables connecting it to the panel. Should I remove two ribbon cables on one side and and power on the tv? My t-con board number is: 54T01-C04 / T546HW01

The picture will sometimes clear up and look normal. See last pic. Which may be capacitors? But the caps are not bulged at all. None . Thanks

[yohnsee]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Now you can make this test:
Power down your tv.
Disconnect the 2 left ribbon cables, that run from the t-con to the display.
Plug your set back in the mains, turn it on.
You should see half of the picture. If the picture is okay (no red stripes or any other problems) then that part of your t-con should be fine. Now repeat the above steps, only now with the 2 ribbon cables on the right side. Then post back, what did you have.

[TubeJunkie]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Ok. I done the test you suggested. But the tv is not acting up. Here's pics of the test. The first pic is with the left two tcon ribbon cables disconnected. The second pic is the right two tcon ribbon cables disconnected. But like I said it's behaving normal while I did this test. But the picture with the left two disconnected looks grainy to me. Thanks

[yohnsee]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Now I have a few things on my mind. You are doing these tests in a row, and the tv has heated up to working temperature, this can cause the good behaviour.
If you happen to have canned air at home, you can try to spray some on the t-con board, holding the can upside down. This will cool down the components rapidly, and may show us where to search. You can also do this test with all the ribbon cables connected back in place.
I will rest my head for today, tomorrow we can continue to discover the problem.

[TubeJunkie]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

I’ve ran this TV for the past few days for up to 10 hours at a time. It’s worked perfectly. I had removed and inspected all boards. Sanded the light corrosion on all ground tabs. So, it’s possible that one of the connectors were loose os slightly corroded. I’m not sure. All is working well. So far, so good.

[yohnsee]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Ok, I hope you're right, and it was only a contact problem.
Get back here, if your problem occurs again.

[TubeJunkie]

Re: Toshiba HT551U Has Red Picture and Vertical Lines - TCon ???

Fingers crossed. I moved it into my living room. It’s working good. Only time will tell. Thanks for your help.