I've gotten through all the codes except for the 991-1 one. Many codes turn it off and on while the slider is on TV. So if I hit done or slide back to DTV and test it doesn't work, so to try another code means going back into Remote Setup-Panasonic Codes... etc etc, so every try can take a minute or so.
Now that I see Edmund's tip about pressing the key twice, I'll try all the code all over again. Edmund, please clarify which key is it I may have to hit twice, OFF or ON or POWER? It seems odd that the code works to turn ON/OFF when I'm in the Remote setup screen (toggled to TV of course) and then fails in DTV mode. Wish there was a manual punch-through.
It would be either ON or OFF key depending the code, the middle PWR key in the Directv device only controls directv device. And you say the ON & OFF keys work fine in the tv device, where middle PWR key should also work fine for TV.
What also might be effecting the tv power commands in the directv device is extra command added to keys like volume and power in the Directv white remotes, try the following:
2. press and hold MUTE & SELECT, wait two blinks, release
3. enter 9 6 3
4. press CH DOWN
retry some of the codes, the full list of panasonic codes are:
10250, 11480, 11457, 10051, 10030, 10162, 100226, 10650, 11271, 11291, 11310, 11510, 11919, 11941, 11946, 11947