I'm having some trouble with the "Input" functionality, though. The "Input" key brings up the input menu just fine. Thanks to the functionality in the posts mentioned above, the "Enter" key works, too. I can't use the Up and Down keys to switch input, though.
If it helps, my remote's setup code is: 11265
My remote's signature is: 3039
Can someone help me figure out how to get this bit to work?
Even better, can someone tell me where the list of EFCs is?
There are two principal ways of getting EFCs. One is to use the Lookup Tool, which can tell you the EFCs that Univeral Electronics has used. A second is to use RemoteMaster and check the contents of upgrades at hifi-remote.com.
I'd start with a direct approach. From post #13 of your last link: "The cursor buttons are different among 10030, 10178, 11265, 11331, and 11758". Temporarily assign the other setup codes and see if one provides working cursor keys. Then you can use the Lookup Tool to get the EFC for that setup code.
If none of those work, I would just start searching manually among all 256 possible EFCs.