Intermittent problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 4, “Parts listing, Type 7377 server,” on page 125 to determine which components arecustomer 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.v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technicalinformation, hints, tips, and new device drivers or to submit a request for information.Symptom ActionA problem occurs onlyoccasionally and is difficult todiagnose.1. Make sure that:v All cables and cords are connected securely to the rear of the server andattached devices.v When the server is turned on, air is flowing from the fan grille. If there is noairflow, the fans are not working. This can cause the server to overheat andshut down.2. Check the system event log or IMM event log (see “Event logs” on page 24).3. Make sure that the server and IMM firmware has been updated to the mostrecent code levels.4. Review the operating system logs.5. Contact your operating-system vendor to set up any available tools that arecapable of monitoring the server.6. If an error occurs, run the DSA program and forward the results to IBM serviceand support for analysis.7. See “Solving undetermined problems” on page 121.The server resets (restarts)occasionally. 1. If the reset occurs during POST and the POST watchdog timer is enabled (clickAdvanced Setup --> Integrated Management Module (IMM) Setting --> IMMPost Watchdog in the Setup utility to see the POST watchdog setting), makesure that sufficient time is allowed in the watchdog timeout value (IMM POSTWatchdog Timeout). See the Installation and User’s Guide for informationabout the settings in the Setup utility.If the server continues to reset during POST, see “POST” on page 26 and“DSA messages” on page 61.2. 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 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 system starts, the operatingsystem might have a problem; see “Software problems” on page 53.3. If neither condition applies, check the system-event log (see “Event logs” onpage 24).Chapter 3. Diagnostics 43
