Re: VT420M zombification

After installing a used mainboard, the backlight and picture returned. Probably the sound, too.

As for the original mainboard: I noted before that the top cage was staying cold on the original board. On the new one, whatever is in there warmed it up appropriately, so its on the same circuit as my mystery problem. I may go spelunking in there and see what's shaking once I'm done catching up on my show.

Re: VT420M zombification

So is it failing to provide the BL_on because the B+ is missing? Vice versa?

Which mosfet? Is there somewhere I can stick my probes?

Oh, it may have no significance, but I also noticed that the two metal cages on the main board, if I leave the tv "on", the bottom one gets warm and the top one, by the LVDS connectors, stays cold.

Re: VT420M zombification

Let's see if these will do. And one of the power board as well. I'm still waiting to hear there's an easy fix for all my troubles on that side....

Trying to bring this thing back from the dead, and I am new to LCD repair but I have fixed some things before. I am hoping to attempt a component-level repair but I need to narrow down the issue a bit.

This Vizio VT420M (ccfl) was a pawn shop as-is buy: "no sound, HDMI input only". (I don't care about the sound, but it never provided sound from either speaker or output jack. Getting it home, I was able to use all video inputs and even the digital tuning was fine. Score!)

A month later, in the middle of a show, the picture froze and scrambled into the repeated...

Re: New Members - please post your introductions here

The details of my life are quite inconsequential.

I fix broken things in order to have things I can't actually afford. The obvious next step would be to fix broken things to sell and get money to actually afford more things, but I am too busy fixing more broken things to have more things I can't actually afford for any of that.