Please kindly note that X5C beeping all the time can have the following issues and you may check which one caused this by going to Menu > Configuration > Exceptions and selecting one by one:
1. HDD Error: Errors when writing or not formatting the Hard Disk before using or not using HDD.
2. Network Disconnect: No Ethernet, so please make sure the NVR is connected to a functional network and online.
3. IP Conflict: Please confirm whether your NVR IP address conflicts with the IP addresses of other network devices in your home by going to Configuration-Network-General, if it is, please disable the Enable DHCP button to modify the IP address of your NVR.
4. Record Exception: No video hard disk exists, so please check whether you have an HDD installed.