Hi guys,
does anyone have the working RS232 serial commands for a Yamaha RX-V3900?

I've searched al of these forums and other sites but am having no luck.
There are threads on this site regarding them and have links to a site that has the commands but the link is redundant.

I've tried the most basic commands from things I've found on the net like the following command but cant get the amp to respond:

PUT System(Power_Control(Power=On))

Im running at 9600 Baud etc but no luck.

Has anyone got the correct list of commands or hints? I've verified my COM1 port is definilty working by sending and receiving data back and forth from my laptop at 9600 so its not a hardware issue.

Any help would be greatly appreciated or if you could PM me or email the codes to paulypearce at gmail.com would be great!

Thanks in advance!