These are some codes that I have aquired from
me sony str-db940 remote:

Power ON / Power OFF (not new)
Mute ON / Mute OFF
5.1 ON / 5.1 OFF
EQ. Tone ON / EQ. Tone OFF
Sound Field ON / Sound Field OFF (starts at the
top i.e. Normal Surround on my receiver)

I also have an alternate "All sony off" command
than the one posted on this site. Might be good
for other systems where the one posted here does
not work.

I'm curious if anyone would interested in seeing
if these are good for other sony receivers. If
so, let me know and I'll send you the codes.

p.s. the codes are all clean and garbage free.

SanMan