You have mail.

Give these a try I don't have a Samsumg to test on:

Power Toggle           08 22 00 00 00 00 D6
Input: TV              08 22 0A 00 00 00 CC
Input: AV1             08 22 0A 00 00 01 CB
Input: AV2             08 22 0A 00 00 02 CA
Input: S-Video1        08 22 0A 00 00 03 C9
Input: S-Video2        08 22 0A 00 00 04 C8
Input: Component1      08 22 0A 00 00 05 C7
Input: Component2      08 22 0A 00 00 06 C6
Input: PC              08 22 0A 00 00 07 C5
Input: HDMI1           08 22 0A 00 00 08 C4
Input: HDMI2           08 22 0A 00 00 09 C3
Mode: Dynamic          08 22 0B 00 00 00 CB
Mode: Standard         08 22 0B 00 00 01 CA
Mode: Movie            08 22 0B 00 00 02 C9
Mode: Custom           08 22 0B 00 00 03 C8
Size: 16:9             08 22 0B 01 00 00 CA
Size: 4:3              08 22 0B 01 00 01 C9
Size: Zoom1            08 22 0B 01 00 02 C8
Size: Zoom2            08 22 0B 01 00 03 C7
Size: Panorama         08 22 0B 01 00 04 C6

There is no discrete power or volume up/down command, you must enter a value 1-100 for volume.