: To identify which code is currently active, hold [MUTE] and [POWER] , enter 990 , and then press 1 , 2 , and 3 sequentially. Count the LED flashes for each digit.
: To identify which code is currently active, hold [MUTE] and [POWER] , enter 990 , and then press 1 , 2 , and 3 sequentially. Count the LED flashes for each digit.