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-   -   Vizio E65-F0 Backlight On, No Picture (https://www.badcaps.net/forum/showthread.php?t=104271)

Storyteller12 03-08-2022 10:04 AM

Vizio E65-F0 Backlight On, No Picture
 
2 Attachment(s)
Have this TV with no picture. When I first got it the same symptom. Backlight on but no picture. I check the tcon fuse and it was bad. So I ordered new tcon and mainboard packaged together.

I replaced the tcon and mainboard and still have the same symptom but the fuse on the tcon did not blow.

I tried unplugging one side at a time of the lvds cables and still get no picture. Not even half white screen. Just black screen with backlights on.

Anyone have any suggestions or run into this problem on this model?

Storyteller12 03-08-2022 10:06 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
1 Attachment(s)
Power supply

Storyteller12 03-08-2022 10:07 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
1 Attachment(s)
Main board

Storyteller12 03-08-2022 10:08 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
1 Attachment(s)
Tcon

Storyteller12 03-08-2022 10:10 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
1 Attachment(s)
Also I found this eeprom chip on the panel buffer board. Never seen this before. Maybe itís bad/ corrupt?

dskall 03-08-2022 10:21 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
I would be checking t-con voltages. Maybe panel dragging down a voltage.

Storyteller12 03-08-2022 11:47 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
1 Attachment(s)
Did some more digging around and found a few shorted caps I believe.

Itís a group of them coming off that eeprom I mentioned on the buffer boards.

I removed 1 fro circuit and it was shorted. However the group of caps still all test short also.

Not sure how to find which one is bad or if itís the eeprom except for removing each 1 by 1.

diif 03-08-2022 11:56 AM

Re: Vizio E65-F0 Backlight On, No Picture
 
Your photo is blurry but they look black not cap colour suggesting they are inductors and so will read as short.

Storyteller12 03-08-2022 12:44 PM

Re: Vizio E65-F0 Backlight On, No Picture
 
Quote:

Originally Posted by diif (Post 1115503)
Your photo is blurry but they look black not cap colour suggesting they are inductors and so will read as short.

I think you are correct. Itís getting harder to see these small things. Guess Iím getting old.

captainKKK 03-08-2022 04:18 PM

Re: Vizio E65-F0 Backlight On, No Picture
 
Have you checked the PS board? What are its voltages?
Where did you get the mainboard and tcon?
Have you had time to check t-con voltages?


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