Remote Code for Insignia T.V.

I hate to assume, so when you say you have done the Code Search you mean the Code Search from the manual?

If you did the Code Search and it didn't work... well that pretty runs through every code set in the remote so you are SOL.

From the Manual:

Performing a Code Search
If none of the codes listed allows you to control your device, a code search may detect the
correct code. Performing a code search can take up to 20 minutes.
1. Prepare the remote control. Point the remote away from your recorder.
Press and hold the TV PWR and DIRECTV buttons simultaneously for about 5 seconds (until the red light at the end of the remote lights up and stays on when you release the buttons).

2. Enter the search code 0999.
After you press the fourth digit of the code, the red light on the end of the remote control will flash twice, then remain on.

3. Test the remote control. Point the remote control at the TV or A/V stereo system.
Press CHAN UP. Did the TV or A/V stereo system turn off? If not, wait two or three seconds, then press CHAN UP again. Continue doing this until the TV or A/V stereo system responds.
When the TV or A/V receiver does turn off, press ENTER to select the current code.
The red light at the end of the remote control will flash three times to indicate that the remote control is properly coded to control your device.
When the red light on the end of the remote control turns off, you have reached the end of the available codes.
Unfortunately, due to the great variety of TVs and A/V stereo systems, some makes and models are not compatible with your recorder’s remote control. If you reach the end of the available codes without finding a code that works with your device, you will need to use your TV or A/V stereo system’s remote to turn it on and off, and control the volume.