Insignia ns-32d20sna14 wont power on

[tallica2002]

I have this Insignia tv and all I get is the standby light continuous red power button and remote has no effect, took it apart and it has what appears to be a power supply and a main board. I am wondering where I can start in troubleshooting it with multimeter. I have included pictures of the boards. Thanks in advance.

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

Update I found out how check for voltages I learned that you have to use a ground from cold side all my 12v have 14v all my 5v have 5v p/on had 5v even if you pressed power on/off had .04v even with power button pressed. Please point me in the right direction. I think its the main board myself.

[bikerbuddy]

Re: Insignia ns-32d20sna14 wont power on

tallica2002 please post picture of the whole back of your TV and individual board so we can see all your connections .

[CapLeaker]

Re: Insignia ns-32d20sna14 wont power on

Update I found out how check for voltages I learned that you have to use a ground from cold side all my 12v have 14v all my 5v have 5v p/on had 5v even if you pressed power on/off had .04v even with power button pressed. Please point me in the right direction. I think its the main board myself.

That can't be, unless the PSon is active low. You would have to verify that. So measure all voltages again and post them here with the pin out names, tv on, tv off...

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

Ok you are right as you see I am still learning I have checked voltages again and I also have a new update while trying to get these voltages the tv actually powered on and all the 12 volts went back to being 12v instead of 14 or 15 so all the on voltages i have listed are when the tv would not actually power on but pushing the power button would change the voltages. I hope you guys understand what Im talking about cant seem to get it to act up again but my mom said the picture would be scrambled sometimes and getting it to come on would be hit and miss.

connector 2
OFF On
GND 0 0
GND 0 0
5v .01 5
5v .01 5
p/on .07
5sb 5
5v .01 5
5v .01 5
GND 0
GND 0
GND 0
12v 0 14
12v 0 14
Connector 3
off on
12v 0 14
12v 0 14
gnd 0
gnd 0


connector 4
off on
12v 0 14
12v 0 14
on/off .01 .04
adj .01 .04
gnd 0
gnd 0 0

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

guess i edited once too many the adj on connector 4 was .02 instead of.04 after power was pressed and p/on was 4.94 after power was pressed and all the 5v were actually 5.18

[simplytrini]

Re: Insignia ns-32d20sna14 wont power on

Hi Tallica2002, I beleive you will probably need to replace the eeprom on the main board if you can find one. Can you please post pictures of the set if you can.

[CapLeaker]

Re: Insignia ns-32d20sna14 wont power on

The p/on pin doesn't change at all? Take a can of air upside down and spray the eeprom. Turn the tv on and see what happens.

[budm]

Re: Insignia ns-32d20sna14 wont power on

on/off .01 .04. This the Backlights ON/OFF pin, it is not getting the command form the main board.
adj .01 .04'. This is the Backlights diming control pin, it is not getting the command from the main board.
So you do have main board problem, so as others had indicated, EEPROM or something else on the board went out.

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

ok can this be hit or miss because the set has been working for the past 2 hours and seem to be fine at the moment. Should I do the can of air with the set on and working or what? What does the eeprom look like? can someone highlight it or something on one of my pics.

[CapLeaker]

Re: Insignia ns-32d20sna14 wont power on

Since the tv is working again, make sure all connectors are clean and properly seated and all the board screws are tight.

[budm]

Re: Insignia ns-32d20sna14 wont power on

Since the TV is working again, can you please verify the DCV of the P/ON pin?

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

5v

[budm]

Re: Insignia ns-32d20sna14 wont power on

5v

Thanks, so it is active HIGH for the PS-ON signal.

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

well 4.92 to be exact.

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

I have an update tonight after the tv has worked fine for the past few days it decided to freak out it made a pop noise which I think came from the speakers it turned green and scrambled picture I tried to take a picture of it but it cut off before I could and then it restarted and everything was fine again.

[ReeceyBurger123]

Re: Insignia ns-32d20sna14 wont power on

Sounds like a intermittent voltage reg on the Mainboard.

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

is that something you can replace or replace the main board

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

I was finally able to get a picture of it doing what I described it did this 3 times in a row scrambled picture and restart.

[tallica2002]

Re: Insignia ns-32d20sna14 wont power on

now its back to not coming on at all so everybody pretty much agrees its the main board?