Had the same problem. You have to get a universal remote that matches the tv. Bought it today at Kmart (Walmart has it too). Only set me back $10-11 bucks and most def. worked. Set it to the tv and hit the Input button, GAME mode came right on. Here is what I posted in another forum on here.
I had the same problem until today. I bought the same tv and went to
Kmart/Walmart. I bought the RCA Universal remote (RCR412SI). Only set
me back $10-11 bucks. Has like 3-4 ways to set the tv, dvd, sat-cable
and vcr/aux. Even allows several tvs I believe. Couldn't set it at
first, then there was the other method where the remote did the search.
Worked! Here is the device,
I hope this helps everyone out. If you have the 6419TC 19" TV, it will work, just make sure you read
the directions and be patient. Will save you money.