Intermittent problemsThis information provides steps for solving intermittent problems.Table 30. Symptoms and actions for 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 215 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 a Trainedservice 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 142) 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 C, “UEFI/POST error codes,” on page 473and Appendix B, “DSA diagnostic test results,” on page 335.3. 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 205.Keyboard, mouse, or pointing-device problemsThis information provides steps for solving keyboard, mouse, or pointing-deviceproblems.Table 31. Symptoms and actions for 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 215 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 a Trainedservice technician.Symptom ActionAll or some keys on thekeyboard do not work. 1. Make sure that the following conditions are met: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 thekeyboard is connected directly to the server, try another port. If the keyboardworks, replace the USB hub.5. Replace the keyboard.196 System x3750 M4 Types 8722 and 8733: Installation and Service Guide
