Insignia NS-32L430A11 Turns off After about 35 Seconds

[Paul678]

Then I have to either unplug it, or press the power button again,
to get the red "Stand by" LED to turn back on.

Then I can turn it on again, but it will turn off again after about 35 seconds.

There doesn't seem to be any sound either.

The top half of the picture is darker, and after doing a google search, I found someone had the same problem:

http://electronics.forumsee.com/a/m/...-problems.html


They mentioned that transformer T401 was burned on the Backlight Inverter / Power Supply , so I checked mine, and sure enough, it was charred a bit too.

Should I take a chance with the Shopjimmy repair kit? Or should I just sell the main board, the stand, and the LCD screen on Ebay?

As you all know, you can go through plenty of work, and STILL not have a working TV!!



Any advice appreciated!

[Paul678]

Re: Insignia NS-32L430A11 Turns off After about 35 Seconds

Then I have to either unplug it, or press the power button again,
to get the red "Stand by" LED to turn back on.

Then I can turn it on again, but it will turn off again after about 35 seconds.

There doesn't seem to be any sound either.

The top half of the picture is darker, and after doing a google search, I found someone had the same problem:

http://electronics.forumsee.com/a/m/...-problems.html


They mentioned that transformer T401 was burned on the Backlight Inverter / Power Supply , so I checked mine, and sure enough, it was charred a bit too.

Should I take a chance with the Shopjimmy repair kit? Or should I just sell the main board, the stand, and the LCD screen on Ebay?

As you all know, you can go through plenty of work, and STILL not have a working TV!!



Any advice appreciated!

Ok, so T401 is part # 8TC00569-01GP, which is a hard part to find.

The closest I found was this one:

http://www.ebay.com/itm/261115290859...%3AMEBIDX%3AIT


Which is a 8TC00564.

Do you think it might still work? What is the difference
between the parts? Is the turns ratio the same, or close enough?

[dick_barton]

Re: Insignia NS-32L430A11 Turns off After about 35 Seconds

If the top half of the picture is darker then you may well have CCFL tube or CCFL connection problems and not transformer problem.
Can you bring on the backlights with the mainboard disconnected?

[Paul678]

Re: Insignia NS-32L430A11 Turns off After about 35 Seconds

If the top half of the picture is darker then you may well have CCFL tube or CCFL connection problems and not transformer problem.
Can you bring on the backlights with the mainboard disconnected?

Well, the transformer is definitely burned out, but I have indeed
read that as the CCFL tubes age, they can have less resistance, and
draw more current, and lead to overheated or blownout transformers.

The TV cannot be turned on with the mainboard disconnected.

Even the standby LED doesn't turn on in that case.

I'm thinking I might pass on this one, and sell the mainboard on Ebay!

[dick_barton]

Re: Insignia NS-32L430A11 Turns off After about 35 Seconds

With the mainboard disconnected, if you connect 5Vstb to PS_ON using a 1K resistor and 5V to BL_ON using another 1K resistors will they come on then?

Edit,
If you are certain that the transformer is burnt out then there's no point doing the above.

[Paul678]

Re: Insignia NS-32L430A11 Turns off After about 35 Seconds

With the mainboard disconnected, if you connect 5Vstb to PS_ON using a 1K resistor and 5V to BL_ON using another 1K resistors will they come on then?

Edit,
If you are certain that the transformer is burnt out then there's no point doing the above.

Yes, I have done that trick before, but the transformer is definitely
blown..... it is charred and blackened....

I think this one is another Ebay special!