I just bought Guitar Hero on PS3 and I have a problem with the guitar controller. When I want to synchronize with the console, there are short and rapid flashes on both devices, but ultimately it does not work.
You have the ability to change the "channel" of the port that is being used to connect your controller to the PS3
(You will see the Guitar Hero logo and below is a kind of diode.) -
The small diode lights up when the console recognizes the accessory, but it also acts as a button to establish a link when using the Guitar over another channel.