How to check the AP Hardware issue?

Fault Symptom 1
Scenario:The AP is powered off, and the indicator does not provide any indication.
Troubleshooting Procedure:
Step 1: Remove the AP decorative cover and connect the AP to the PoE power supply device for power supply.
Note: Replacement test, ensure the PoE adapter or PoE switches can work normally before it power up the AP.
Step 2: Check whether the indicator is on. Wait for about 3 minutes and check whether 192.168.110.1 can be accessed through the Web portal.
Step 3: If the fault persists after the preceding operations, the hardware is faulty. Send the hardware back to the factory for repair.
Fault Symptom 2
Scenario 1: After the AP is powered on, the SYS indicator blinks, but other indicators are off.
Scenario 2: After login to the AP, it showing the firmware loss issue, the device can not boot up normally.
Troubleshooting Procedure
Step 1：Remove the AP decorative cover and connect the AP to the PoE power supply device for power supply.
Step 2：Check whether the indicator is on. Wait for about 5 minutes and check whether the AP fault can be automatically rectified. Check whether 192.168.110.1 can be accessed through the Web portal.
Step 3：If the SYS indicator continuously blinks fast, which indicate the main program is lost, please follow the guide via https://www.ruijienetworks.com/rita  to recover the firmware for AP. If the fault persists after the preceding operations, the hardware is faulty. Send the hardware back to the factory for repair or replacement.