1# Power Manager Error Codes 2 3> **NOTE** 4> 5> This topic describes only module-specific error codes. For details about universal error codes, see [Universal Error Codes](errorcode-universal.md). 6 7## 4900101 Service Connection Failure 8 9**Error Message** 10 11Operation failed. Cannot connect to service. 12 13**Description** 14 15This error code is reported for a service connection failure. 16 17**Possible Causes** 18 191. The system service stops running. 20 212. The internal communication of system services is abnormal. 22 23**Solution** 24 25Check whether the system services are running properly. 26 271. Run the following command on the console to view the current system service list: 28 29 ```bash 30 > hdc shell hidumper -ls 31 ``` 32 332. Check whether **PowerManagerService** is included in the system service list. 34 35## 4900102 System Shuting Down 36 37**Error Message** 38 39Operation failed. System is shutting down. 40 41**Description** 42 43This error code is reported when an operation failed during system shutting down. 44 45**Possible Causes** 46 47The system is shutting down. 48 49**Solution** 50 51Make sure that the operation is performed when the system is running properly. 52