Kinda new to this so bare with me. This is a vizio E420V0. Completely dead,no power light,nothing. On the main board,"3642-0972-0150(41)" the 3v nano fuse is blown. From the fuse through a cap goes to u6 a IC or eeprom.not sure what it is. If I'm doing this correct with meter in diode mode. From pin one to last pin"straight across" It shows shorted. Thinking this is what I need to replace. I can't find it. The part number is LA8004PG AN08. I'm I on the right track.
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Re: vizio dead set
https://www.badcaps.net/forum/attach...1&d=1516135770
Are you saying that the white fuse by the connector of the main board that goes to the power supply is blown?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
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Re: vizio dead set
Main board:
http://assets.shopjimmy.com/media/ca...0150-top_5.jpg
Power supply board:
http://assets.shopjimmy.com/media/ca...1030-top_4.jpg
The two fuses on the main board:
F1 is for the 5V STBY, that 5VSTBY is fed to many circuits on the main board so shorts circuits can be any where that the 5VSTBY is connected to.
F2 is for switched 12V.Last edited by budm; 01-16-2018, 04:20 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=24809
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Re: vizio dead set
Because I am going by a different ic part number "ap3435" I can't be certain about what the exact output voltage on pin 7 should be, but it seems to be fine.
Pin 2 has no connection
pin 3 and 6 should be ground
See page 15 of the pdfAttached FilesLast edited by R_J; 01-16-2018, 07:46 PM.
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Re: vizio dead set
So right now the 5VSTBY Voltage is going up and down? and the resistance between GND and the jumper is?
You were using diode mode for checking for shorts:
Post# 1: 'If I'm doing this correct with meter in diode mode. From pin one to last pin"straight across" It shows shorted.' You should use Ohm mode instead.Last edited by budm; 01-16-2018, 10:02 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=24809
Comment
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Re: vizio dead set
How about the shorts that you indicated in POST #1? What is the resistance reading?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
Comment
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Re: vizio dead set
You can test the power supply/inverter board by itself by disconnecting the cable between power supply board and the main board then use 1K resistor between 5V STBY and the PS-ON pin, another 1K resistor between 5VSTBY and the BL-ON (I ON-OFF) to force on the power supply and the backlights when AC is applied to the board, the backlights should come on and stay on as as as the AC is present. If the backlights still do not come on then you will need another 1K resistor between 5V stby and the DIM pin.Last edited by budm; 01-17-2018, 04:11 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=24809
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