When troubleshooting AAS problems, you need to verify the following to solve the problem.
Do stations have LED activity?
Is green LED (12V DC rail) on AAS processor lit?
LCD screen activity:
Is there any information on the LCD screen? In monitor mode?
Check if fuses are installed and good?
Do stations have 12V DC?
Is console mode set correctly?
Is patch correct?
Switches on AAS processor:
Does anything change when you toggle them?
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