A client's cable box was recently changed to the Cisco Explorer 8640HDC. I can't find IR codes for it in any of the databases.

No problem. I learned all the codes into my good old Pronto TS1000. All of the commands work. For those much more IR-savvy than I, a few commands are:

Power
0000 0048 0000 0018 00c0 00c2 0030 0092 0030 0092 0030 0031 0030 0092 0030 0092 0030 0092 0030 0092 0030 0092 0030 0031 0030 0031 0030 0031 0030 0031 0030 0031 0030 0092 0030 0031 0030 0031 0030 0031 0030 0031 0030 0031 0030 0092 0030 0092 0030 0092 0030 0879

Channel up
0000 0048 0000 0018 00c0 00c2 0030 0092 0030 0092 0030 0031 0030 0092 0030 0092 0030 0092 0030 0031 0030 0092 0030 0092 0030 0092 0030 0030 0030 0030 0030 0031 0030 0092 0030 0030 0030 0030 0030 0030 0030 0092 0030 0031 0030 0031 0030 0030 0030 0092 0030 0879

Channel down
0000 0048 0000 0018 00c0 00c2 0030 0092 0030 0092 0030 0031 0030 0092 0030 0092 0030 0031 0030 0092 0030 0092 0030 0092 0030 0092 0030 0030 0030 0030 0030 0031 0030 0092 0030 0030 0030 0030 0030 0092 0030 0031 0030 0031 0030 0031 0030 0030 0030 0092 0030 0879

1
0000 0048 0000 0018 00c0 00c2 0030 0092 0030 0092 0030 0030 0030 0092 0030 0092 0030 0031 0030 0031 0030 0031 0030 0030 0030 0092 0030 0031 0030 0031 0030 0031 0030 0092 0030 0031 0030 0031 0030 0092 0030 0092 0030 0092 0030 0092 0030 0031 0030 0092 0030 0879

0
0000 0048 0000 0018 00c0 00c2 0030 0092 0030 0092 0030 0030 0030 0092 0030 0092 0030 0092 0030 0030 0030 0031 0030 0092 0030 0092 0030 0031 0030 0030 0030 0030 0030 0092 0030 0031 0030 0031 0030 0030 0030 0092 0030 0092 0030 0031 0030 0031 0030 0092 0030 0879

Menu
0000 0048 0000 0018 00c0 00c2 0030 0092 0030 0092 0030 0031 0030 0092 0030 0092 0030 0092 0030 0031 0030 0031 0030 0092 0030 0092 0030 0092 0030 0031 0030 0031 0030 0092 0030 0031 0030 0031 0030 0031 0030 0092 0030 0092 0030 0030 0030 0030 0030 0030 0030 0879

Stored the Pronto file. Used the Universal Browser to import the commands. The first time I did this, with Pronto Edit still open, only one command worked at all: MENU. But it worked perfectly as the GUIDE command. No other commands worked. Using RF.

Closed ProntoEdit, detached all commands, reattached all commands. Now none of them work. Using RF & IR just to be sure the signal hits the IR sensor.

Any clues?

Also posted in Custom Installers Forum.