Hi, the message "R740 The watchdog timer expired" is a hardware-level error message indicating that the server's watchdog timer has triggered a timeout or has not been reset in time. This can happen when the server becomes unresponsive or encounters a critical issue, leading to a system failure. The information you provided about the system, firmware, and OS version does not directly relate to the specific error message. The error message you mentioned is not related to OpenManage Server Administrator (OMSA), which is a software application used for managing Dell servers. OMSA is a system management software that allows you to monitor and manage the hardware components and system health of Dell servers. The current version of OMSA on your system is not mentioned in the information provided. To troubleshoot the "watchdog timer expire" error, you should check the server's hardware logs, iDRAC logs, or event viewer for more detailed information about the error. Additionally, updating the system's firmware, drivers, and OMSA (should be updated) to the latest versions might help prevent such errors in the future. 
A server that has failed elsewhere. Information for the current server.   BIOS : 1.4.5CPLD : 1.0.1iDRAC & LC : 3.21.21.21PSUs : 00.23.32NICs : 20.8.4Storage : 25.5.5.0005BP/Enc : 4.26   Is this message only for OMSA version? OMSA is installed. But I don't know the current version.
R740 The watchdog timer expire.