The audio went out on my insignia NS-LCD26A. It

Check whether the audio is muted by accidental press at remote control button. Enter its sound menu, and check it. If muted, as you know there will be no audio output. If not muted, check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

It sounds that the main digital board to this set is not functioning. There are many reasons for this, and is not a user repairable fault. Contact any service technician.

Replaceent will be the best way to go since most boards are multi level circuit boards. I would check with www.tvcircuitboards.com they should have either the entire board or just the HDMI port depending on which way you choose to go with the repair.

Parts for Insignia TVs can be ordered by visiting BestBuy.partsearch.com or calling 1-888-237-8289.

You can find many universal remote control codes at InsigniaProducts.com, just search for your TV model number and click on the Support Tab.

You can find remote control codes for your TV here. Select your exact model number. If the codes listed don't work, there is a listing of compatible brand codes that you can try.

ns-lcd26a
Hi,I fixed my here's issues i had and the fix i did..
ns-lcd26a
Every now and then i would get snow and a pink picture.
Then tv stop turning on .

To fix i seen on main board capacitor cp25 and cp28 near the heat sink was bad
They were both 470uf 35v...
on the power board i seen c531 47uf 50v was bad.
i also heated up the heat sink on the main board to resit the chip ,,
and tv now works

I didnt bother putting the huge shield back on main board i figure it was a issue to over heating the cpu instead take the hit to the brain from the fcc radio wave lol

First do the 3 caps and see if it works if not then do the blow dryer to the heat sink on main board

Click here to find a remote control for your TV.

I just ordered a replacement powerbord online thru bestbuy. ill let you know if it fixes it

The input button or volumn arrow key might work.