Vizio E371VA No picture

[GrimJAck]

I have a Vizio E371VA with no picture. The backlight is on and I believe is OK. I have checked all the voltages to the inverter board and they are OK. I check the voltage at the large cap on the power supply and that is OK too. I did the cable wiggle test on the TCON board and it produces visible noise on the screen.

I believe it is the main board. I'd like to fix it. I have seen someone replace the regulators on a Vizio main board for a different model but my main board is different.

Does anyone know where the regulators are on the 715G3715-M02-000-004K main board? I'd like to test them to see if that is the cause.

[newtothis]

Re: Vizio E371VA No picture

First thing lets rule anything else out, In my opinion I cannot see it being the mainboard.

Pictures of boards and one of T-con. Check fuse on tcon

[GrimJAck]

Re: Vizio E371VA No picture

Thanks for the reply.

Here are pics of the main board, PSU, and inverter. I need to desolder the shield off the T-con board. My soldering iron decided to not work just now.

I will post that one when I get the shield off the board.

[GrimJAck]

Re: Vizio E371VA No picture

Here is a pic of the T-con board. Thanks.

FB4401 right below the connector, middle left. is OK. I found 6 fuses on the back of the board that are all OK too.

[newtothis]

Re: Vizio E371VA No picture

Look near the input connecter on the T-con.. should see a component with brass/gold ends.. prefix for the component will be F, So something like F21/13a or similar... Set multimeter to Ohms and probe to each end (set turned off). What reading do you get?

[GrimJAck]

Re: Vizio E371VA No picture

I get .1 Ohms. This is the FB4401 fuse. See the pic. This that the fuse you are talking about?

[newtothis]

Re: Vizio E371VA No picture

Indeed, So fuse is good.

Power on the set and check Volts DC at the fuse, lets make sure you have power to the tcon

[GrimJAck]

Re: Vizio E371VA No picture

There is 12.04V on both ends of the fuse.

[GrimJAck]

Re: Vizio E371VA No picture

Any other ideas on what I can check?

[budm]

Re: Vizio E371VA No picture

I see four 3-pin devices, they are more likely to be voltage regulator ICs. Please read the link below on how to report the readings in the format that we can read.