Vizio E470Vl no backlight problem
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Re: Vizio E470Vl no backlight problem
Vizio 3647-0292-0150 is your main board based on the number as printed on barcode.
http://www.shopjimmy.com/vizio-3647-...or-e470vl.htm#
http://www.shopjimmy.com/vizio-3647-...repair-kit.htm
Per description from SJ:
The Vizio 3647-0292-0150 Main Board Component Repair Kit includes all necessary components to repair common failures on the Main Board. Symptoms include stuck or frozen at the Vizio welcome screen, TV turns on when you press the power button but has no backlights.
Part 2
Symptoms:
No Backlights
Description Quantity Board Location
Integrated Circuits 1 U33
You may want to look at U33 to get the P/N as printed on top of the IC to see what it is what its function is.
Pictures provided by shopjimmy.Last edited by budm; 02-18-2016, 05:08 PM.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=24809Comment
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Re: Vizio E470Vl no backlight problem
I am curious as to what the U33 is, can you read any printing top the of the body?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=24809Comment
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Re: Vizio E470Vl no backlight problem
That is the dual MOSFET:
https://cdn.badcaps-static.com/pdfs/...e9f2435410.pdfAttached FilesNever 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=24809Comment
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Re: Vizio E470Vl no backlight problem
so uhh.. what ever happened here?Don't fear the repair...Comment
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Re: Vizio E470Vl no backlight problem
I know this is an old thread but I'm trying to help out an eBay member with a no backlight issue on this same model. His BL-ON signal is 1.32V and I'm wondering is that's the issue. What is typically enough to activate the backlights? I would think it should be more in the 2.5V - 3V range so I'm thinking he's got a main board problem.
Any opinions are greatly appreciated.Comment
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Re: Vizio E470Vl no backlight problem
It was indeed too low of a voltage to activate the backlights. I had the member just jump the PS-ON to the BL-ON pin and snip the wire going to the main board that activates BL-ON. For now, he's watching the TV again with no money spent.Comment
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Re: Vizio E470Vl no backlight problem
Which one goes to main to activate BL/ON?Comment
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Re: Vizio E470Vl no backlight problem
Show us the pictures of your power supply board and a closed up of the connector on the power supply board that goes to the main board.
Are you having BL-ON control signal from main board problem?
What is the TV not doing?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=24809Comment
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