Vizio E601i-A3 - No Power Issue

[budm]

Re: Vizio E601i-A3 - No Power Issue

Your video showing meter is set to Ohm mode, it should be set to Volt mode to read the 3.3VDC output of the power supply board.

[Element18592]

Re: Vizio E601i-A3 - No Power Issue

Your video showing meter is set to Ohm mode, it should be set to Volt mode to read the 3.3VDC output of the power supply board.

My mistake, I thought you were wanting to check the resistance under load.

https://www.youtube.com/watch?v=VwjHBSJZP5s

[budm]

Re: Vizio E601i-A3 - No Power Issue

OK, so the 3.3v Standby power supply is handling the lamp load OK without dropping out.
What we need to do next is to connect the main board back in place but disconnect the 12V AU and 12V T-CON wires and see if the 3.3V will be stable at 3.3V or not.

[Element18592]

Re: Vizio E601i-A3 - No Power Issue

OK, so the 3.3v Standby power supply is handling the lamp load OK without dropping out.
What we need to do next is to connect the main board back in place but disconnect the 12V AU and 12V T-CON wires and see if the 3.3V will be stable at 3.3V or not.

12V AU and 12V T-CON disconnected

https://www.youtube.com/watch?v=XUg1piXQLyM

Also with the bulb attached

https://www.youtube.com/watch?v=GEuENRDiObI

[budm]

Re: Vizio E601i-A3 - No Power Issue

OK, leave those two wires of still but the connector between the main board and the power supply board still in place, no lamp connected, then disconnect everything else that are connected to the main board and see what happen, if the 3.3V is still going up and down then you will have to use 3.3V external power supply that has DC Current meter so you can see how much current it is drawing.