My TV screen went blank. Has power and sound works but I can only see the screen with the lights off and with flashlight. Insignia ns-48d510na15.

90% chance of bad LED backlights, 5% of power board issue 5% of main.

I don't work on all that many insignia sets but generally all sets work the same, have you tried the flashlight test?

so does every thing else that is turned off.

Here is a link to the INSIGNIA NS-39D310NA15 manual:

Insignia NS 39D310NA15 User Manual

Good luck!

Insignia has the manuals for most of their products on the product page. Click on the Support/Downloads tab. For the NS-40D510NA15, see http://www.insigniaproducts.com/products/televisions/NS-40D510NA15.html . The direct link to the User's Guide (as a PDF) is http://www.insigniaproducts.com/cms/documents/manuals/NS-40D510NA15_14-1088_WEB_V3_ENG_Final_lr.pdf . There is additional documentation available and there is an HTML version of the user's guide as well.

I hope this helps.

Cindy Wells

See the image.

Gopakumar Gopalan Google

Refer its user manual for details.

"Blinks a few times" implies the TV is flashing a fault code at you. If you can find a service manual for your model, count the number of blinks and look it up in the diagnostics section.

However, the most likely problem is a burned-out electrolytic capacitor in the power supply. These are usually easy to identify visually; the top of the can-shaped capacitor should be flat, but may be bulged out and may have brown or black material leaking from the vent scores. The photo below shows a bad capacitor to the right of a good one; both have black plastic sleeves.

If this is the case, replacement capacitors are relatively cheap. However, you should look for the following criteria in choosing a new part:
>Capacitance (uF): same as the original, or 10% higher if the original value is not available
>Voltage: same or higher
>Temperature: Maximum temperature should be same or higher
>Physical size: should fit in the space occupied by the original; if buying a taller unit, make sure it will fit when the back cover is reinstalled, and make sure the capacitor will not touch heat generating parts such as heat sinks, resistors or large transistors.
>Ripple current: get the highest available without compromising too much on endurance. Ripple current may be specified in mA or A; 1 A = 1000 mA. Sometimes you can get a better rating by going to a higher voltage part, but physical size may be a limitation.
>Endurance: Try to get 8000 hours or better.

I usually use Panasonic FR1 series capacitors, although United Chemi-Con EKZN capacitors are also worth a look.

Most likely you have a fault in the back light circuit. To verify this, turn on the set, when the screen goes black, take a bright flashlight and shine it on the screen. It may be easier to dim the lights in the room so that you can see the faint image on the screen. If you see the faint image, you indeed have a back light problem. You will need to get a diagnoses performed on the set to track down the problem

Replaced vertical IC ( la78041 ??>.. Or La78040 ). Look for born resistor beside IC. Replaced capacitor 100uf 35V too!!! Good luck !!