1, power status. If the power indicator does not light up, it means that the power supply is not energized or the power supply is faulty.
2. Hard disk status. The second light is on, indicating that the hard disk is reading and writing data.
3. a unified country. The first Three Lamps District is on, which means that the server is running the system.
4. Network status. The fourth indicator lights up, indicating that the server is connected to the network.