Jumpers and connectors This section provides specific information about the jumpers. It also provides some basic information about jumpers and switches and describes the connectors on the various boards in the system. System board jumpers help disable the system and setup passwords. To install components and cables correctly, you must be familiar with the connectors on the system board. Child TopicsSystem board jumpers and connectorsSystem board jumpers and connectors on the R740xd system are described as follows: System board jumper settings Use this topic for information on system board jumper settings. Disable a forgotten passwordThe system's software security features include a system password and a setup password. The password jumper enables or disables password features and clears any passwords currently in use.