Standby Voltage

[tech2014]

Isn't the standby supposed to be on when the AC is plugged in and goes into full power mode when the power button is pushed.

I have a tv that has standby LED but the standby voltage keeps jumping around between 5v and 0.5V. Any reason why?

[budm]

Re: Standby Voltage

The standby power supply is an always on power supply which runs the minute the AC is applied.
So if you disconnect the load from the standby, will it become steady?
It is in the loop (shutdown/startup) right now which can be due to bad cap, too much load being applied, shorted/leaky rectifier in the secondary side, etc.
Make/model/pictures of this unit?

[tech2014]

Re: Standby Voltage

Hi budm. Here is the link to the original thread on this tv. https://www.badcaps.net/forum/showthread.php?t=39729

I am leaning towards the main board being the problem. When I disconnect the load there is no change. I notice that I never get a VS_ON signal which is from the main board. I tested it with load and removed each board and still no VS_ON. The 5V still goes between 0.5 and 5V no steady 5V.

[tom66]

Re: Standby Voltage

When I disconnect the load there is no change

So the standby still bounces with main board out? Could be bad start up capacitor.