Vizio VA320m Black Screen Help!

[Adam925]

Re: Vizio VA320m Black Screen Help!

If anyone has some insight for what my next step should be, i would be much obliged.

[attainteddragon]

Re: Vizio VA320m Black Screen Help!

at this point you can replace your main or see if you can find a fault on the one that you have. you would need to check the caps for esr/capacitance value and i could see 1 ldo regulator that you can check. could be others on the board, i just couldn't see any.

[Adam925]

Re: Vizio VA320m Black Screen Help!

at this point you can replace your main or see if you can find a fault on the one that you have. you would need to check the caps for esr/capacitance value and i could see 1 ldo regulator that you can check. could be others on the board, i just couldn't see any.

My main what? board? fuse?

[Adam925]

Re: Vizio VA320m Black Screen Help!

Please Help me spot something i cant seem to sniff out... i can smell a burnt diode or resistor like a fat kid can smell cake

[Adam925]

Re: Vizio VA320m Black Screen Help!

One thing i forgot to mention, don't know if this matters at all but when running that 470~1K resistor trick. The Backlights would come on before i turned on the power to the unit. So when power was turned on there was really no noticeable difference on the screen. But when i would power down the unit they would(Backlights) go off. Still cant get into the menu or anything associated to the initial set up.

[attainteddragon]

Re: Vizio VA320m Black Screen Help!

One thing i forgot to mention, don't know if this matters at all but when running that 470~1K resistor trick. The Backlights would come on before i turned on the power to the unit. So when power was turned on there was really no noticeable difference on the screen. But when i would power down the unit they would(Backlights) go off. Still cant get into the menu or anything associated to the initial set up.

when you jump a ps on, or bl/on you will have no control over it any more. it has now been hard wired. these signals come from the main board and in bypassing them, you are able to rule out faults in the ps or inverter/backlight section.


what i thought was an ldo on the main appears to be something else. the new pics allowed the top of the ic to be read, and i was unable to find any info on it.

i am unsure if you can get an eeprom for this set, someone else might have the deets on that.

[Adam925]

Re: Vizio VA320m Black Screen Help!

when you jump a ps on, or bl/on you will have no control over it any more. it has now been hard wired. these signals come from the main board and in bypassing them, you are able to rule out faults in the ps or inverter/backlight section.


what i thought was an ldo on the main appears to be something else. the new pics allowed the top of the ic to be read, and i was unable to find any info on it.

i am unsure if you can get an eeprom for this set, someone else might have the deets on that.

dont want to sound like a noob but whats a eeprom?

[Adam925]

Re: Vizio VA320m Black Screen Help!

dont want to sound like a noob but whats a eeprom?

is it the same as on a PC motherboard?

[attainteddragon]

Re: Vizio VA320m Black Screen Help!

i believe that they are similar to pc versions. they hold all of the prior settings that the tv had when it is turned off, so it can restart in the same state as it was.

[dskall]

Re: Vizio VA320m Black Screen Help!

I think I would just find a main board as troubleshooting mains is rather involved