Solving undetermined problemsIf the diagnostic tests did not diagnose the failure or if the server is inoperative, usethe information in this section.If you suspect that a software problem is causing failures (continuous orintermittent), see “Software problems” on page 122.Damaged data in CMOS memory or damaged BIOS code can cause undeterminedproblems. To reset the CMOS data, use the clear CMOS jumper (JP2) to clear theCMOS memory; see “System-board jumpers” on page 13. If you suspect that theBIOS code is damaged, see “Recovering from a BIOS update failure” on page 137.Make sure that both the ac and dc power LEDs on the rear of the power supply arelit, indicating that the power supply is operating correctly; then, complete thefollowing steps:1. Turn off the server.2. Make sure that the server is cabled correctly.3. 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 Modem, printer, mouse, and non-IBM devices.v Each adapter.v Hard disk drives.v Memory modules. The minimum configuration requirement is one 512 MBDIMM on the system board.v Service processor.The following minimum configuration is required for the server to turn on:v One microprocessorv One 512 MB DIMM on the system boardv One power supplyv Power cordv System board4. Turn on the server. If the problem remains, suspect the following components inthe following order:a. System boardb. Memory modulec. Microprocessord. SAS/SATA controllerIf 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 thesystem board or SAS/SATA controller.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.Problem determination tipsDue to the variety of hardware and software combinations that can be encountered,use the following information to assist you in problem determination. If possible,have this information available when requesting assistance from Service Supportand Engineering functions.148 System x3200 Types 4362 and 4363: Problem Determination and Service Guide
