User's Manual

Table Of Contents
Users Manual of GS-5220 PoE Series Managed Switch
419
Solution:
1. AC power cord is not inserted or faulty.
2. Check that the AC power cord is inserted correctly.
3. Replace the power cord if the cord is inserted correctly; check that the AC power source is working by connecting a
different device in place of the switch.
4. If that device works, refer to the next step.
5. If that device does not work, check the AC power.