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 07-03-2019, 12:46 PM   #1
nosugartonight
Member
 
Join Date: Jan 2018
City & State: Bluefield Virginia
My Country: united states
I'm a: Knowledge Seeker
Posts: 95
Default VIZIO M551D-A2 completely dead

Can someone tell me which board has failed, power or main. Its a vizio m551d-a2, ver. LWJJOJBP2202120. There is no sign of life. No standby light, "nothing" Voltages on connector to main board are. Pin 1-5vsb=5.10v,pin 2-5vsb=5.10v, pin 3-ac off det.=3.27v, pin 4-pson=3.10v, 5&6 GND=0v, pin 7-5v nc=0v, pin 8-5v nc=0v, 9&10-GND=0v, pin 11-reg 12v=0v, pin12-reg 12v=0v, don't know what pin 13 and 15 are labeled but 13 reads 0v, 15 reads .61v, The connector just above is labeled reg 12v and reads 0v on both pins. Across the big capacitor reads 389.6v. No change pressing the power button. Also take a look at the pic of the transformer, looks to me that it got hot or is this normal. Thanks for any help.
Attached Images
File Type: jpg WP_20190703_13_35_02_Pro.jpg (434.3 KB, 13 views)
File Type: jpg WP_20190703_13_35_18_Pro (2).jpg (519.5 KB, 17 views)
File Type: jpg WP_20190703_13_36_05_Pro (2).jpg (569.4 KB, 9 views)
File Type: jpg WP_20190703_13_38_55_Pro.jpg (374.7 KB, 13 views)
File Type: jpg WP_20190703_13_35_29_Pro.jpg (494.5 KB, 13 views)
nosugartonight is offline   Reply With Quote
Old 07-03-2019, 03:12 PM   #2
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: 38,506
Default Re: VIZIO M551D-A2 completely dead

Right now he PS-ON is present so the PFC Voltage booster is working, 389.6V PFC Voltage is present, but the switched 12V, 24V power supply section is not running.
Is this the exact same board as yours?
https://www.shopjimmy.com/vizio-56-0...led-board.htm#
__________________
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 07-03-2019, 09:40 PM   #3
nosugartonight
Member
 
Join Date: Jan 2018
City & State: Bluefield Virginia
My Country: united states
I'm a: Knowledge Seeker
Posts: 95
Default Re: VIZIO M551D-A2 completely dead

I was thinking the Power board. But wanted to get someone else's thoughts with experience. Thanks Budm for replying. When I looked up the "151" board, showed it was for m551d-a2r. I knew then the 161 was the same. Thanks again.have a safe 4th
nosugartonight is offline   Reply With Quote
Old 07-03-2019, 09:43 PM   #4
nosugartonight
Member
 
Join Date: Jan 2018
City & State: Bluefield Virginia
My Country: united states
I'm a: Knowledge Seeker
Posts: 95
Default Re: VIZIO M551D-A2 completely dead

I wanted to ask what you thought about the transformer. Meant to last post but forgot.
nosugartonight is offline   Reply With Quote
Old 07-04-2019, 11:32 AM   #5
R_J
Badcaps Veteran
 
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 6,292
Default Re: VIZIO M551D-A2 completely dead

I see nothing wrong with the transformer. What do YOU see that seems bad?
R_J is offline   Reply With Quote
Old 07-13-2019, 06:37 PM   #6
nosugartonight
Member
 
Join Date: Jan 2018
City & State: Bluefield Virginia
My Country: united states
I'm a: Knowledge Seeker
Posts: 95
Default Re: VIZIO M551D-A2 completely dead

Budm, thanks tv up and running couple weeks , was PB.
nosugartonight is offline   Reply With Quote
Old 07-13-2019, 08:39 PM   #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: 38,506
Default Re: VIZIO M551D-A2 completely dead

Thanks for the follow-up.
budm 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 - 2020
Powered by vBulletin ®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 08:03 PM.
Did you find this forum helpful?