Tuner Won't Acknowledge Sound

Before turning the unit on, press the calib/batt button to check the battery condition.
The Fender AG6 only responds when the strings pitch is within a certain frequency range. If the guitars tuning is not within that range or if your installing new strings, first connect the guitar to the AG6 with a cord that you know to be in good working condition and turn the AG6 on. Then starting with the low E string (the thickest one), loosen the tuning peg to a point well below the standard tuning for that string. Then slowly tighten the peg as you strike the string repeatedly. When the strings frequency, comes within range you will see the 6E light glow and the needle will begin to deflect. When the needle reaches zero it is in tune. Do the remainder of the strings the same way then go back and recheck each a second time. If you have a tuning fork, you can use it to tune by ear then re-tune and maintain it with the AG6
Remember to always stretch then re-tune new strings several times.
If the AG6 does not respond even after checking the condition of the battery and the cord that connects the guitar to the tuner, the problem could be inside the AG6 with a bad connection on the board. Try moving the cord as you strike a string that you know is close to being in tune. Again a tuning fork would be helpful.
~DrewWatk