Vizio M470NV - Blinking logo

[AndrewBuchinger]

Re: Vizio M470NV - Blinking logo

So now that I have most likely blown a fuse or worse, is a resistance test across a fuse enough to see if it is good?

TV will no longer power on the standby and I get nothing on the supply

(I arced the power, I think it was high though, 165 instead of 145 rated)

[AndrewBuchinger]

Re: Vizio M470NV - Blinking logo

and you can laugh I think it's funny

[AndrewBuchinger]

Re: Vizio M470NV - Blinking logo

So I am not going to give up on this and if you guys are willing to help me fix my mistake as well it would be appreciated. I am gonna head to bed for the night.

[Dgtech]

Re: Vizio M470NV - Blinking logo

Anybody ever find out how to fix this problem? I don't personally have this problem but I know someone who does. I'm advising him whether or not to buy a new one instead.

[@roielty]

Re: Vizio M470NV - Blinking logo

lol, soooo i have this problem, HAHA its 2015 now and its the same B.S. well friends best of wishes, I'm taking this thing apart. scrap this thing.

[ecking767]

Re: Vizio M470NV - Blinking logo

most likely the main board is the problem.

[CoppellTVRepair]

Re: Vizio M470NV - Blinking logo

We have seen a few different reasons for main board failure since we started offering a repair service for them about 4 months ago:

1) HDMI multiplexor Sil3985CTU is one of the, sometimes along with surrounding components;

2) Flash NAND IC U6 can get corrupt and cause all kinds of problems from totally dead TV (we've seen an IC with all blocks being bad straight off the board) to issues like failing to start the Vizio apps. The later suggests it doesn't have built-in checksum check otherwise it would not be starting up at all when there's a corruption in any actively used partition where firmware is stored;

3) We've seen a few cases where the main processor has gone bad or solder joints corroded to it.

On top of that there are at least two boards where we're still not knowing what has failed.


Of all the three above the HDMI processor and the firmware IC are relatively easy to replace, but reasonably hard to diagnose and know with certainty that this is what is needed.

Both are available from various distributors, including ourselves.

We also have the main processor, not sure if it is listed for sale since replacing it is not a walk in the park unless you've been doing this for a living or at least for a reasonably long time with appropriate equipment.
If you do not then it's definitely wiser to give the board to someone who does.

Hope this helps.

[Amcguigan]

Re: Vizio M470NV - Blinking logo

Did anyone ever come to a conclusion on this topic? My TV randomly turned itself off today while it was on (I wasn't in the room to see if it flashed or anything but heard the volume go out) and when I came in it was flashing the logo on the bottom (not on the screen) tried turning off the tv, holding down the power button when it was unplugged with no resolution. I just ripped the back of the tv off and now I'm lost with what I'm looking at.... any help would be great.

[Amcguigan]

Re: Vizio M470NV - Blinking logo

I think I figured out how to post a photo to his thread any ideas?