Vizio LED xvt553sv

[mnpdreed]

I need help trouble shooting a Vizio LED xvt553sv. The backlight when plugged in is amber then white. When you push power button the screen is blue/black with no audio. I have a little knowledge of electronics but not much. I also have a digital multimeter. Thanks for any advise where or how to test

[mnpdreed]

Re: Vizio LED xvt553sv

Few pic

[mnpdreed]

Re: Vizio LED xvt553sv

Pic

[mnpdreed]

Re: Vizio LED xvt553sv

Does any Bad Cap veterans have any advise on where to start testing. LED back light is on with no sound or picture.

[budm]

Re: Vizio LED xvt553sv

I need help trouble shooting a Vizio LED xvt553sv. The backlight when plugged in is amber then white. When you push power button the screen is blue/black with no audio. I have a little knowledge of electronics but not much. I also have a digital multimeter. Thanks for any advise where or how to test

Does any Bad Cap veterans have any advise on where to start testing. LED back light is on with no sound or picture.

Are you talking about the VIZIO logo lights on the front bezel or the backlilgts that light up the screen?
Can you see the screen glow in the dark?

[mnpdreed]

Re: Vizio LED xvt553sv

When power cord is plugged in the Vizio logo on the front flashes amber then solid white. When I press the power button, the back light comes on and the screen turns a dark bluish color. No picture or sound. Thank you for your help

[mnpdreed]

Re: Vizio LED xvt553sv

The Vizio is LED.

[mnpdreed]

Re: Vizio LED xvt553sv

This is power supply used

[mnpdreed]

Re: Vizio LED xvt553sv

When the power button is on and the back light is on there is a very small amber led illuminated on this board

[mnpdreed]

Re: Vizio LED xvt553sv

Other pics

[budm]

Re: Vizio LED xvt553sv

When power cord is plugged in the Vizio logo on the front flashes amber then solid white. When I press the power button, the back light comes on and the screen turns a dark bluish color. No picture or sound. Thank you for your help

OK, we need to check the T-CON board then.

[mnpdreed]

Re: Vizio LED xvt553sv

Is the T Conn one of the boards in the pic and where do I start.

[budm]

Re: Vizio LED xvt553sv

https://www.badcaps.net/forum/attach...7&d=1412198480

White fuses TF1, F4.
Check and see if you do have DC Voltages on both ends of the fuse, meter ref to chassis ground.

[mnpdreed]

Re: Vizio LED xvt553sv

Here are the reading:

98.2 mV = TF1= 98.2 mV

5.15 V = F4 = 5.15 V

[budm]

Re: Vizio LED xvt553sv

Here are the reading:

98.2 mV = TF1= 98.2 mV

5.15 V = F4 = 5.15 V

TF1 the main fuse for the T-CON shows in mV range and F4 shows 5V, that does not make sense since the main Voltage feed is through TF1 fuse.

[mnpdreed]

Re: Vizio LED xvt553sv

Here are the fuses

[budm]

Re: Vizio LED xvt553sv

Well, if you read Voltage in mV on TF1 fuse, then the main board is not sending the Voltage to the T-CON board, which can be bad switched MOSFET, or the processor is not sending the signal to turn on the MOSFET for it to send the Voltage to the T-CON board. This not going to be easy tracing the connections on the main board.

[mnpdreed]

Re: Vizio LED xvt553sv

Pic of reading. This is with the power on with back light on

[mnpdreed]

Re: Vizio LED xvt553sv

Here is a pic of led back light from the rear and what the picture looks like

[budm]

Re: Vizio LED xvt553sv

Try re-seating both end of that LVDS cable, also inspect both ends of the LVDS cable and the connectors to see if there is any corrosion.