Solving undetermined problemsIf Dynamic System Analysis (DSA) cannot diagnose the failure or if the server isinoperative, use the information in this section to solve the undeterminedproblems.About this taskIf you suspect that a software problem is causing failures (continuous orintermittent), see “Power problems” on page 143.Corrupted data in CMOS memory or corrupted UEFI firmware can causeundetermined problems. To reset the CMOS data, use the CMOS jumper to clearthe CMOS memory and override the power-on password; see “System-boardjumpers” on page 28. If you suspect that the UEFI firmware is corrupted, see“Recovering the server firmware” on page 150.If the power supplies are working correctly, complete the following steps:Procedure1. Turn off the server.2. Make sure that the server cover is closed and latched correctly.3. Make sure that the server top cover/power cut-off switch cable is connectedcorrectly.4. Make sure that the server is cabled correctly.5. Remove or disconnect the following devices, one at a time, until you find thefailure. Turn on the server and reconfigure it each time.v Any external devices.v Surge-suppressor device (on the server).v Printer, mouse, and non-IBM devices.v Each adapter.v Hard disk drives.v Memory modules. The minimum configuration requirement is 2 GB DIMMin slot 1 when one microprocessor is installed in the server.6. Turn on the server.ResultsIf the problem is solved when you remove an adapter from the server but theproblem recurs when you reinstall the same adapter, suspect the adapter; if theproblem recurs when you replace the adapter with a different one, suspect the risercard.If you suspect a networking problem and the server passes all the system tests,suspect a network cabling problem that is external to the server.148 System x3650 M4 BD Type 5466: Installation and Service Guide
