Insignia NS-48D510NA15 No Backlight

[davery]

Newbie here. I have the Insignia NS-48D510NA15 with no backlight. I was able to take it apart and used two 9V batteries in succession to test each strip. One strip appears to be bad, as I could not get it to light up. Is this a valid method for testing each LED strip? Should I assume when one strip is bad, none will light up? If so, should I replace the one bad strip or all of them? With only one strip not working, could it be something else? Thanks for any help. As I said, I am a newbie with TV's, so any help would be appreciated.

[budm]

Re: Insignia NS-48D510NA15 No Backlight

Please provide good clear pictures of the whole backside of the TV so we can see how all the boards are connected together, also good clear pictures of the power supply board (connectors in place).
How many wires are there on the LED connector?
If the LED strips are connected in series to form one large LED string, then yes if one of the LED is bad, or bad connector that links the strip is bad the whole LED string will not light up. But right now we cannot tell hoe all the LED strips are connected together.

[davery]

Re: Insignia NS-48D510NA15 No Backlight

Please provide good clear pictures of the whole backside of the TV so we can see how all the boards are connected together, also good clear pictures of the power supply board (connectors in place).
How many wires are there on the LED connector?
If the LED strips are connected in series to form one large LED string, then yes if one of the LED is bad, or bad connector that links the strip is bad the whole LED string will not light up. But right now we cannot tell hoe all the LED strips are connected together.

Which is the power supply board and the LED connector? Thanks for the help. Sorry, I'm not sure how to post pics.




https://ibb.co/wBTLcn5
https://ibb.co/bvWnPt8

[budm]

Re: Insignia NS-48D510NA15 No Backlight

OK, I only see two wires on the LED connector for the LED string, so the LED strips are connected in series, so that is why when one strip went out due to open LED then whole string of LED will not light up.

[davery]

Re: Insignia NS-48D510NA15 No Backlight

OK, I only see two wires on the LED connector for the LED string, so the LED strips are connected in series, so that is why when one strip went out due to open LED then whole string of LED will not light up.

Which means in all likelihood this is the only issue? If so, I suspect I should replace all the LED strips? What is the best place to buy LED strips? Thanks for all the help.

[budm]

Re: Insignia NS-48D510NA15 No Backlight

Which means in all likelihood this is the only issue? If so, I suspect I should replace all the LED strips? What is the best place to buy LED strips? Thanks for all the help.

If you do get sound and able to see image on the screen using flash lights then more likely the only problem is just bad LED.
There is a link in one of this forum some where I just do not remember for the good place to buy the whole set of LED strip. You should verify that the strips are made for your LCD panel model number.
One you done with the repair you will need to low down the backlights level (not Brightness) to as long as you can to extend the life of the LED since the TV manufacturers always drive the LED at max rating or beyond the spec.