I found this a while back on this Forum. Sorry, I can't remember the author. The stand-by does works for me on a Philips Direct TiVo.

OBC EFC Function
000 181 TiVo menu
017 121 live tv/guide
018 119 DTV menu
019 123 display
020 116 up arrow
021 120 right arrow
022 118 down arrow
023 122 left arrow
024 245 thumb down
025 249 select
026 247 thumb up
030 246 channel up
031 250 channel down
032 213 record
033 217 play
034 215 rewind
035 219 pause
036 212 fast fwd
037 216 slow-mo
038 214 instant replay
039 218 jump to live ->|
040 085 num 1
041 089 num 2
042 087 num 3
043 091 num 4
044 084 num 5
045 088 num 6
046 086 num 7
047 090 num 8
048 149 num 9
049 153 num 0
050 151 clear
051 155 enter/last
053 152 standby
054 150 guide (alt.)