I have a Comcast on Demand and ended up have to do a code
search on my Insignia. The Sansui codes did not work.
Took me about 40 codes but it finally Worked...
In my case, the Sansui code was effective; here's the dirt:
Remote: Comcast On Demand DVR 3-Device
TV: Insignia 24", IS-TV040922A
Code: "Sansui," 0463
That said, I couldn't tell you if that same code would work for other Insignia TV's
