How do I sync my guitar into the xbox 360

SOURCE: Xbox 360 - Guitar Hero Aerosmith

That is a very common problem and here is a step by step solution. Press the little button on the Xbox 360 with a wireless sign on it. It's on the front in between the memory card slots and the power button.

After you've done that the Xbox lights should go like around in circles.

Hold the button with the same picture on it on the Guitar controller its on the edge near the LAN port and microphone port

Then they should sync Happy Gaming to you.

SOURCE: cant sync my wireless guitar to the xbox

Step one: Hold the Xbox button on the controller for 5 seconds
Step two: click the connect button on the xbox.
Step three: Hold the connect button on the controller for 5 seconds.

If they are not broken, this should work. This is the PROPER way to connect ANY wireless controller.

SOURCE: how do sync the guitar w/ xbox 360 console?

Start the game and go into the options menu. There is an option to calibrate lag. Complete the instructions and the guitar will be synchronised with your TV.
If you mean how do you assign a guitar controller to the console, press the small button near the headphone port after pressing the guide button to turn the controller on, then press the small circuar button on the front of the console like you would with a regular 360 controller to assign the controller to the Xbox.

SOURCE: Guitar with slider for Guitar Hero will not sync...

Sorry. Cant help you. Maybe go to GameStop?

SOURCE: Guitar not working for Xbox Guitar Hero

This got to be a hardware failure with the guitar, there is no wires or some button you pressed by mistake.

Try checking out that cables are plugged in, try to switch USB port to connect on the xbox 360, or else its a hardware problem.