Vizio M370NV Powers on for 2 seconds then shuts down

[budm]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

The mainboard is telling the power supply to do what it should, turn on and then turn on the backlights. Since there is no backlight error signal etc. from the power supply back to the main, the main has no idea if the backlight is on or off and really does'nt care.
Thats why I suspect the main board, and it could be an eeprom issue or I suspect it is more likley a bga problem on the large chip.

+1.
This TV does not use Backlights error signal to feed it back to the main board to tell the status of the Backlights, beside when you perform backlights forced on test, the local protection is still present so if there is issue with the Backlights, I.E. open circuit or over current condition, the local protection in the Backlights circuit in the power supply board would have kick in and shutdown the backlights, but you are not seeing that, correct? That is my theory. Taking the panel apart will be the last thing I will do.
You make the decision on what you want to do, you can also contact shopjimmy to see what they suggest.
BTW, what happen if you disconnect the T-CON, does it go into shutdown?

[MisterD]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

+1.
This TV does not use Backlights error signal to feed it back to the main board to tell the status of the Backlights, beside when you perform backlights forced on test, the local protection is still present so if there is issue with the Backlights, I.E. open circuit or over current condition, the local protection in the Backlights circuit in the power supply board would have kick in and shutdown the backlights, but you are not seeing that, correct? That is my theory. Taking the panel apart will be the last thing I will do.
You make the decision on what you want to do, you can also contact shopjimmy to see what they suggest.
BTW, what happen if you disconnect the T-CON, does it go into shutdown?

The Backlights do stay on when I perform forced on test, I only left them on about 5 to 10 mins maximum...I don't see a T-Con board and none listed on Shopjimmy or ebay for this Vizio Model M370NV

[budm]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

It looks like it has integrated T-CON.

[MisterD]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

It looks like it has integrated T-CON.

Is that integrated in with the Panel? if so should I remove the 2 flat ribbon cables coming out of the Main board and power on the tv to see what happens?

[MisterD]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Is that integrated in with the Panel? if so should I remove the 2 flat ribbon cables coming out of the Main board and power on the tv to see what happens?

I unplugged both flat ribbon cables that come out of the main board to the panel, still had backlights without the vizio logo on screen of course no video with them unplugged...tv powered off within 2 to 3 seconds just as before.

[MisterD]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

+1.
This TV does not use Backlights error signal to feed it back to the main board to tell the status of the Backlights, beside when you perform backlights forced on test, the local protection is still present so if there is issue with the Backlights, I.E. open circuit or over current condition, the local protection in the Backlights circuit in the power supply board would have kick in and shutdown the backlights, but you are not seeing that, correct? That is my theory. Taking the panel apart will be the last thing I will do.
You make the decision on what you want to do, you can also contact shopjimmy to see what they suggest.
BTW, what happen if you disconnect the T-CON, does it go into shutdown?

Shopjimmy is Not offering any Technical Assistance and they do not plan on doing so in the future.also I tried to get a discount from them since they have 9 of these Main Boards( Vizio 3637-0582-0395) in stock, but got turned down for that too.

[Diah]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

man if you with this waiting time took the screen apart then you are now watching TV with it. LOL

[MisterD]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

man if you with this waiting time took the screen apart then you are now watching TV with it. LOL

Read all of Post #41

[Diah]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Read all of Post #41

up to you and the poster..LOL

[R_J]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

man if you with this waiting time took the screen apart then you are now watching TV with it. LOL

OK genius, How do you explain the FACT that when the power supply is operated without the main board the backlights work perfect?

[Diah]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

don't try to touch my personally

answer to geniuses questioner ...

EDGE LED are different from Direct LED... his LED EDGE you want to know more ask i will answer you how they are different

[R_J]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Explain it to the op

[Diah]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

LOL then wait and we will hear soon

[nomoresonys]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Bigger pleeez I'm finding it hard to read.

[Diah]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Bigger pleeez I'm finding it hard to read.

hahaha nomoresonys
now i do know why you are suggest always heating PSU LOL... take it easy.. we are all Zero but still friends over here

[nomoresonys]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

hahaha nomoresonys
now i do know why you are suggest always heating PSU LOL... take it easy.. we are all Zero but still friends over here

It's a good legit test, REALLY SURPRISED that you can't grasp it. You being a GENIUS and all, FURTHER is that why you have everyone who will fall for it, tearing their tv apart just to look at the backlights before the simple backlight voltage test??? You have been wrong many times and so have I BUT I don't claim to be the GENIUS that you claim to be. Last time you were wrong was yesterday NO WAIT it was today.

[nomoresonys]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Here's an example diah, YOU didn't even know this BASIC FACT, you were rambling on about something BUT you were WRONG AGAIN, personally I just assume that you are always smoking something, yippppeee every day is 420 day. You do know some things, not as much as you THINK you do tho, and as a lot of us regulars can attest to...as a teacher or even being able to describe something you get straight F'S FOR FAILURE.: https://www.badcaps.net/forum/showth...ht=purple+leds

[budm]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

don't try to touch my personally

answer to geniuses questioner ...

EDGE LED are different from Direct LED... his LED EDGE you want to know more ask i will answer you how they are different

Any follow-up on this?

[Diah]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

Any follow-up on this?

sure...
in energy saving platform, we find TV with direct LED are in level B or A
TVs with edge LED most of them on level A+ and some A++
so here we are knows the infrastructure of the PSU on edge are different from Direct LED. however we can find the a mounts of LEDs on both are same. or very near to be same amount. but the edge design have power saving more than direct one. using booster of currents and less mount of LEDs on one line play here the roll. this also can be effected on the design of protection mode at HW level and SW level,

again with edge one if we see light of leds on behind the LCD,, doesn't mean we have healthy all line or groups. also if currents go high by shorting one SMT LED some time HW protecting circuit failed to discover or turn whole out.. same case if we force PSU to turn on with out MB action as it play SW protection which never failed.

[budm]

Re: Vizio M370NV Powers on for 2 seconds then shuts down

https://www.shopjimmy.com/vizio-0500...upply-unit.htm
1) This power supply has no feedback signal to tell the Main board the status for the LEDs/LED driver circuit. So How would SW protection being applied in this case?
2) LED's are driven by constant current power supply, if some of the LED's are shorted out, the CC will still be forcing the same constant current, the effect will be that the PWM controlled MOSFET will be dissipating more power dues to more Vdrops to compensate the shorted out LED. You know how constant current power supply works, right?
3) Where are the reference to these: in energy saving platform, we find TV with direct LED are in level B or A. TVs with edge LED most of them on level A+ and some A++.
4) "so here we are knows the infrastructure of the PSU on edge are different from Direct LED. however we can find the a mounts of LEDs on both are same. or very near to be same amount. but the edge design have power saving more than direct one. using booster of currents and less mount of LEDs on one line play here the roll." LOL.
Bottom line, I will not waste any more time on this.