Intermittent problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 5, “Parts listing, System x3750 M4 Types 8722 and 8733,” on page 195 to determine whichcomponents are customer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by aTrained service technician.Symptom ActionThe server resets (restarts)occasionally. 1. Check the IMM event log for messages associated with the restart event.2. If the reset occurs during POST and the POST watchdog timer is enabled (clickSystem Settings --> Recovery --> System Recovery --> POST WatchdogTimer in the Setup utility (see “Starting the Setup utility” on page 128) to seethe POST watchdog setting), make sure that sufficient time is allowed in thewatchdog timeout value (POST Watchdog Timer). If the server continues toreset during POST, see Appendix A, “UEFI/POST error codes,” on page 297and Appendix C, “DSA messages,” on page 321.3. If the reset occurs after the operating system starts, disable any automaticserver restart (ASR) utilities, such as the IBM Automatic Server Restart IPMIApplication for Windows, or any ASR devices that are be installed.Note: ASR utilities operate as operating-system utilities and are related to theIPMI device driver. If the reset continues to occur after the operating systemstarts, the operating system might have a problem; see “Software problems” onpage 186.Keyboard, mouse, or pointing-device problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 5, “Parts listing, System x3750 M4 Types 8722 and 8733,” on page 195 to determine whichcomponents are customer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only),” that step must be performed only by aTrained service technician.Symptom ActionAll or some keys on thekeyboard do not work. 1. Make sure that:v The keyboard cable is securely connected.v The server and the monitor are turned on.2. See http://www.ibm.com/systems/info/x86servers/serverproven/compat/us/ for information about keyboard compatibility.3. If you are using a USB keyboard and it is connected to a USB hub, disconnectthe keyboard from the hub and connect it directly to the server.4. If you are using a USB keyboard and it is connected to a USB hub, disconnectthe keyboard from the hub and connect it directly to the server. If connecteddirectly to the server, try another port. If the keyboard works, replace the USBhub.5. Replace the keyboard.178 System x3750 M4 Types 8722 and 8733: Installation and Service Guide
