Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting TVs and Video Sources
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 10-20-2020, 03:57 PM   #1
brandhr
New Member
 
Join Date: Oct 2020
City & State: Papillion, NE
My Country: Usa
I'm a: Knowledge Seeker
Posts: 5
Default Vizio M65-F0 white light flashing on screen

I have a Vizio 65” M65-F0 that was put into service during 02/2019 and is probably used less than five hours a week on average. The white light in the picture flashes on and off about once every two seconds no matter what I am using for the source. The sound and picture are fine otherwise— so very noticeable/annoying if the scene is dark, not as noticeable when the scene is bright. My questions are: 1. Will replacing the LED strips fix this problem or is it likely a board issue? 2. If it is an issue of replacing the LED strips, should I replace them all or can I just replace the one that is flashing? Thanks.
Attached Images
File Type: jpeg 866679CD-C29A-4FE8-B2DA-90F1BA03BDB6.jpeg (112.4 KB, 15 views)

Last edited by brandhr; 10-20-2020 at 03:57 PM.. Reason: Typo in model number
brandhr is offline   Reply With Quote
Old 10-20-2020, 04:30 PM   #2
xfox
Member
 
Join Date: Feb 2018
City & State: Phily, PA
My Country: USA
I'm a: Knowledge Seeker
Posts: 49
Default Re: Vizio M65-F0 white light flashing on screen

Those Vizio TVs have intelligent full array led blah-blah-blah, main board connected to led driver board with with digital protocol, so I would check driver first for that specific line
xfox is offline   Reply With Quote
Old 10-20-2020, 08:07 PM   #3
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,049
Default Re: Vizio M65-F0 white light flashing on screen

http://cdn.vizio.com/user-manual/PDF...ies_UM_ENG.pdf

See page 14
Try setting the the Pictures mode to Standard.
Auto brightness to off
Backlights level to 50%
Then see what will happen, you may have to do this on all input sources settings.
__________________
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
budm is offline   Reply With Quote
Old 10-20-2020, 08:20 PM   #4
neilc6
Badcaps Veteran
 
Join Date: Nov 2015
City & State: BC
My Country: Canada
I'm a: Knowledge Seeker
Posts: 1,006
Default Re: Vizio M65-F0 white light flashing on screen

I would turn off all the local dimming features.

Black Detail - Adjusts the average brightness of the picture to compensate for large areas of brightness. Select Off, Low, Medium, or High.
• Xtreme Black Engine™ - Based on the content, dynamically adjusts and balances the brightness and the contrast ratio of the picture by locally adjusting backlight zones.
• Clear Action - Reduces blur in scenes with fast action but limits the range for the Backlight setting.
neilc6 is offline   Reply With Quote
Old 10-22-2020, 10:40 AM   #5
brandhr
New Member
 
Join Date: Oct 2020
City & State: Papillion, NE
My Country: Usa
I'm a: Knowledge Seeker
Posts: 5
Default Re: Vizio M65-F0 white light flashing on screen

Thanks for all the responses. I made all the suggested setting changes and no improvement. As far as checking the LED driver board as suggested by xfox, that may be beyond my capabilities. I can generally follow YouTube videos on replacing boards/components but not sure how to check a board (other than looking for the tell tale brown/burned spot). I did find a YouTube video on how to replace the LED Light strips so thought I would ask to see if that could fix the problem. Looks like the LED driver boards are relatively cheap— would it make sense to try replacing that board? If that doesn’t fix it, would it make sense to replace the light strips? Thanks again.
brandhr is offline   Reply With Quote
Old 10-22-2020, 11:24 AM   #6
xfox
Member
 
Join Date: Feb 2018
City & State: Phily, PA
My Country: USA
I'm a: Knowledge Seeker
Posts: 49
Default Re: Vizio M65-F0 white light flashing on screen

If you have a multimeter just check voltage on blinking leds, if not, try new led driver board, just buy on ebay with return option...
xfox is offline   Reply With Quote
Old 10-22-2020, 11:52 AM   #7
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,049
Default Re: Vizio M65-F0 white light flashing on screen

But did you try what we suggested you to try on post #3 & 4?
budm is offline   Reply With Quote
Old 10-22-2020, 12:01 PM   #8
brandhr
New Member
 
Join Date: Oct 2020
City & State: Papillion, NE
My Country: Usa
I'm a: Knowledge Seeker
Posts: 5
Default Re: Vizio M65-F0 white light flashing on screen

Quote:
Originally Posted by budm View Post
But did you try what we suggested you to try on post #3 & 4?
. Yes, as stated I made all the suggested settings changes and no improvement. I do appreciate the suggestions.
brandhr is offline   Reply With Quote
Old 10-22-2020, 12:03 PM   #9
brandhr
New Member
 
Join Date: Oct 2020
City & State: Papillion, NE
My Country: Usa
I'm a: Knowledge Seeker
Posts: 5
Default Re: Vizio M65-F0 white light flashing on screen

Thanks for the additional info on the board. I will order a new board and see if that fixes it.
brandhr is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2021
Powered by vBulletin ®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 10:37 PM.
Did you find this forum helpful?