Vizio E371VL, 2 years old, no amber VIZIO light when plugged in, and no other indications of power. I assumed a bad Power Board and replaced it...same results. I tested voltage going into the PS Board and 120v AC is there going in and out of the fuse. The cable connecting the PS Board to the Main Board shows a fluctuating voltage between 0 and 5v DC on pin 1. When I remove the cable, I then get a solid 5v DC, but no 12v reading on the 12v pins. So...I'm thinking the problem must surely be in the Main Board. Any ideas where/what to test on the Main Board to isolate the problem? Or any other ideas? A picture of the Main Board is attached. Thanks.
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Vizio E371VL no power, no amber
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Re: Vizio E371VL no power, no amber
The switched 12V will not be present until the main board sends out PS_ON to turn on the main power supply (12V, and 24V).
It sounds like the main board is drawing too much current and causes the 5VSTBY to go into start-up/shutdown mode, try to find the cause of the problem down to component level is not going to be easy especially without the diagram.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 E371VL no power, no amber
There are more than one version of this model:
http://www.shopjimmy.com/catalogsear...q=Vizio+E371VL
It is also know for having bad EEPROM.
You can contact shopjimmy about the main board to see what they suggest, they are really good on helping the customer, it is my main supplier for boards.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 E371VL no power, no amber
Yes, I have used ShopJimmy and agree with you. I checked and they do have a board for around $80, but they are not taking tech questions (likely due to the season). So I was hoping there might be a "popular" failure point for this board with this symptom. The board is 3637-0782-0150. I'll likely go ahead and order the board. Thanks again.
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Re: Vizio E371VL no power, no amber
So did the main board fix your issue? I have a set with the same issues and same main board, has 5 volt standby when main board is unplugged but as soon as you plug it in, the 5 volts leaves, unplug the main board and power cord the reapply power cord then 5 volts is back while main board is disconnected
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Re: Vizio E371VL no power, no amber
Update, I just checked the power supply and used 2 resistors to force the power supply on. The backlights and all voltages working on the power supply...I am thinking I just got a bad main board even though it was suppose to have been a good and checked board, I will post back if the main board fixes the problem, I am gonna return this one first this Monday
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Re: Vizio E371VL no power, no amber
Originally posted by countryguy45 View PostUpdate, I just checked the power supply and used 2 resistors to force the power supply on. The backlights and all voltages working on the power supply...I am thinking I just got a bad main board even though it was suppose to have been a good and checked board, I will post back if the main board fixes the problem, I am gonna return this one first this Monday
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Re: Vizio E371VL no power, no amber
Originally posted by countryguy45 View PostSo did the main board fix your issue? I have a set with the same issues and same main board, has 5 volt standby when main board is unplugged but as soon as you plug it in, the 5 volts leaves, unplug the main board and power cord the reapply power cord then 5 volts is back while main board is disconnected
You can also check the resistance of the main board 5VSTBY pin and GND pin to see if it shows very low resistance or not.Last edited by budm; 02-25-2018, 10:25 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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