Re: Vizio service manuals

Looking for service manual for VIZIO M43-C1
Many thanks!

Re: Vizio M43-C1 No Backlights



Thanks for your quick reply!

I was considering the reflow route but many posters here say it won't last long even if the reflow works.

In looking at the heat sink it appears to be soldered to the underside of the board at 5 points. If I remove the 5 blobs of solder the heat sink should come off, right. I could then use the heat gun route to reflow the two main chips....

Re: Vizio M43-C1 No Backlights



Great suggestion!

The $20 power supply board arrived today and, as predicted, didn't fix the problem. Exact same symptoms Fading power light then 15 flashes just like the existing board that tested with good voltages.

So, I'll keep looking for a main board and may try a reflow using my heat gun. Not sure if I'll try oven baking as I see it melts the plastic parts on the main board as per a YouTube video.

Cheers!...

Re: Vizio M43-C1 No Backlights

Great suggestion!

The $20 power supply board arrived today and, as predicted, didn't fix the problem. Exact same symptoms Fading power light then 15 flashes just like the existing board that tested with good voltages.

So, I'll keep looking for a main board and may try a reflow using my heat gun. Not sure if I'll try oven baking as I see it melts the plastic parts on the main board as per a YouTube video.

Cheers!

Re: Vizio M43-C1 No Backlights

This thread on problems with the VIZIO M43-C1 appears to run from when this 4K set came out in 2015 to now.
Clearly looks like the main board was a bad design and repair shops as well as DIY people such as myself are having to try to catch up.
I purchased a VIZIO M43-C1 with no picture/sound/BL
Rookie error: BEFORE testing voltages I ordered a power board. It was cheap so I thought I would give it a try as so many of these sets seem to be fixed with just the power board.
HOWEVER on checking voltages all was good.
...