Vizio E550VL, Standby Only.

[jkirch86]

Hello,

This is my first time seeking help for a repair. Thanks for all your help, advice, and for the great forum.

This TV will not power on. Standby light (orange logo) remains on after AC power is attached, but unresponsive.

I have visually inspected all of the boards and everything looks perfect.
The power supply will only power up when the STANDBY and PSON are shorted. All output voltages are correct.

My guess is a problem with the main board, but I'm not sure what to check from here.

[jkirch86]

Re: Vizio E550VL, Standby Only.

Power supply


Main board

[martino]

Re: Vizio E550VL, Standby Only.

So,no responds at all with either remote or buttons on TV?

[tom66]

Re: Vizio E550VL, Standby Only.

Try checking the voltage regulators on the main board. However most likely you have a firmware problem or bad flash IC.

[jkirch86]

Re: Vizio E550VL, Standby Only.

So,no responds at all with either remote or buttons on TV?

Nope, neither will work.

Try checking the voltage regulators on the main board. However most likely you have a firmware problem or bad flash IC.

I will try checking them asap. What are my options for bad firmware or bad flash IC? A new main board?

[jkirch86]

Re: Vizio E550VL, Standby Only.

I found a problem.

It is a voltage regulator.

The numbers on it are:
M132
G1084

The middle pin doesn't make a connection anymore but it is still showing 3.3 volts.

Should I try to reconnect the middle pin or should I wait until I find a replacement?

[ecking767]

Re: Vizio E550VL, Standby Only.

I found a problem.

It is a voltage regulator.

The numbers on it are:
M132
G1084

The middle pin doesn't make a connection anymore but it is still showing 3.3 volts.

Should I try to reconnect the middle pin or should I wait until I find a replacement?

The tab is the connecting point. that regulator is ok

[jkirch86]

Re: Vizio E550VL, Standby Only.

The tab is the connecting point. that regulator is ok

So the middle pin should not be connected?

[ecking767]

Re: Vizio E550VL, Standby Only.

So the middle pin should not be connected?

NO, because the tab and pin 2 are the same. look at the trace, or ohm it out with a meter

[jkirch86]

Re: Vizio E550VL, Standby Only.

NO, because the tab and pin 2 are the same. look at the trace, or ohm it out with a meter

Yep, they are the same.