Here are are some cleaner versions of the discrete power codes for the Kenwood DV-5900M:
Power On:
9000 006b 0000 0002 00b6 000c 0089 0076
Power Off:
9000 006b 0000 0002 00b6 000c 0088 0077
It looks like that seventh octet should match, but the codes work, so who am I to argue?! :)
-Mike