Vizio VO370M-C Vertical Lines

[KoenigsTiger]

Hey Everyone

I have colored vertical lines on my LCD Vizio-oh. The sticker on the TV says 2009... They seem to alternate colors and brightness, they move on the screen, not just fixed in one spot. All inputs have the same symptoms. Sound is fine.

About 6 months ago the screen got a bit darker, so I turned up the brightness. It worked fine till recently.

The vertical lines showed up. Few days ago it would work for an hour then the lines appeared. The next day I turned on the TV the lines showed up right away, but after 15 min or so they were gone and TV worked for the evening. Next day lines are here to stay. I had the TV on for about an hour, no changes.

I did a visual CAP check on power and logic board, none are popped or leaking...

I pulled the connectors for the T-CON board. When I pull one connector from T-CON the corresponding side of the screen goes blank, vise versa for the other connector. When I pull the connector feeding the T-Con the whole screen does blank...

I tried the compressed air over the T-Con, to cool it. I did not invert the compressed air can to have the freezing white stuff hit the board. I am not sure what part I need to spay???

I checked the T-Con fuse continuity is good.

Should I be checking the voltage on the T-Con somewhere??

Would a factory reset help?


I would really appreciate all the help!!!

Thank you very much
Gene

[petehall347]

Re: Vizio VO370M-C Vertical Lines

start at u1 and work your way through if needed ...

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Hi Pete,

Thank you for the lightening fast reply

I'm just a nooby... I never fixed a TV before.

U1 thats on the T-Con board? What should the voltage be?

Thank you,
Gene

[petehall347]

Re: Vizio VO370M-C Vertical Lines

i meant cool that one first ..
sorry i am fairly new too really .. just being logical .

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

I see U2. Do you mean the large chip in the middle? UC1?

The T-Con board has a blue LED on it. The LED turns on as soon as the TV is turned on, after approx 10 seconds the blue light turns off.

What does that mean?

[petehall347]

Re: Vizio VO370M-C Vertical Lines

big one is uc1 ...
this could well be a different problem ..
hopefully someone with more knowledge will turn up soon .

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Yep, I don't see U1.

[petehall347]

Re: Vizio VO370M-C Vertical Lines

8 legs

[budm]

Re: Vizio VO370M-C Vertical Lines

Try having one ribbon cable between the LCD panel and the T-con board connected one at a time to see what you get on the screen, you MUST BE REAL CAREFUL when you put the cables in place.
I am leaning toward bad panel.

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Gotcha, thanks, I see the U1 now.

I tried cooling a bit, didn't make any difference. How long should I be cooling it for? I even inverted the can of compressed air to get the liquid hit it. Should I just take the whole thing outside it out side, its -22*C?

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Should I be disconnecting the ribbon cables while TV is on or off?

I disconnected them while TV off, and the side for corresponding side goes blank.

Anyone know what the blue LED light is on the T-Con for?

[budm]

Re: Vizio VO370M-C Vertical Lines

TV unplugged when making pluging/unpluging the cables.
So with just one ribbon cable between the T-CON and the LCD panel one at a time, you do not see good clear image on half of the screen?

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Oops, I had the TV plugged in, but turned OFF.

Ribbon cable disconnected; side of screen completely white.

Ribbon cable connected side, same as before.

[budm]

Re: Vizio VO370M-C Vertical Lines

BTW, is that the picture of your T-con board or from the web?
Next, test the DCV on the test points of the T-CON board, check:
VCOM, VGH, VGL, VCC, VCC1.8.

What is the designator for the LED on the T-CON board?
Your picture is too blur, I found board on SJ which is pretty close to your board but I do not see the SMD LED any where.
http://assets.shopjimmy.com/media/ca...-1565a-top.jpg

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Yep, that's my actual t-Con.

LED designation is LD2

Sorry, iPhone4 quality....

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Blue LED is illuminated for about 10 sec after TV is turned on.

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Ld2

[budm]

Re: Vizio VO370M-C Vertical Lines

OK, the board version from shopjimmy does not have the LED installed.
I really do not know what the LED indicator is for.

[KoenigsTiger]

Re: Vizio VO370M-C Vertical Lines

Odd, Jimmy's T-Con is missing a bunch of parts compared to mine. Part number seems to be the same...

[budm]

Re: Vizio VO370M-C Vertical Lines

That Blank PCB P/N 6870C-0247A can be stuff in many ways to make a bunch of different PCBA (PCB Assembly) for many LCD panels.
The P/N of the PCBA should be some where on the board, may on the back side of the board.
http://assets.shopjimmy.com/media/ca...65a-bottom.jpg