Rule of thumb: 99% of the time, codes from a similar model will work fine. If you try existing codes, and they don't work, then post back.

Start here: [Link: files.remotecentral.com]

You can also use the following info in IRScrutinizer to generate your own codes:

Cmd   Protocol Dev Funct (OBC)
AV1       Sony12    1    64
AV2       Sony12    1    65
Input PC  Sony12    1    67
Hdmi 1    Sony15    26   90
Hdmi 2    Sony15    26   91
Hdmi 3    Sony15    26   92
Hdmi 4    Sony15    26   93
ON        Sony12    1    46
OFF       Sony12    1    47
Vol +     Sony12    1    18
Vol -     Sony12    1    19
Mute      Sony12    1    20