IBM 8688 manual Device drivers are installed correctly, Memory problems Make sure that

Symptom	Suggested action
Intermittent problems	Make sure that:
	1.	All cables and cords are connected securely to the rear of the server and
		attached options.
A problem occurs only	2.	When the server is turned on, air is flowing from the rear of the server at the
occasionally and is difficult to		fan grill. If there is no air flow, the fan is not working. This causes the server to
detect.		overheat and shut down.
	3.	Ensure that the SCSI bus and devices are configured correctly and that the last
		external device in each SCSI chain is terminated correctly.
Keyboard, mouse, or	1. Make sure that the keyboard cable is properly connected to the server.
pointing-device problems.	2.	Make sure that the server and the monitor are turned on.
	3.	Try using another keyboard.
All or some keys on the
keyboard do not work.
The mouse or pointing device	1.	Make sure that the mouse or pointing-device cable is securely connected
does not work.		and the device drivers are installed correctly.
	2.	Try using another mouse or pointing device.
Memory problems	Make sure that:
	1.	DIMMs are seated properly.
	2.	You have installed the correct type of memory.
	3.	If you changed the memory, you updated the memory configuration with the
		Configuration/Setup Utility program.
	4.	All banks of memory on the DIMMs are enabled. The server might have
		automatically disabled a DIMM bank when it detected a problem, or a DIMM
The amount of system memory
		bank could have been manually disabled.
displayed is less than the
	Look in the POST error log for error message 289:
amount of physical memory
installed.	v	If the DIMM was disabled by the user or by SAL/EFI:
		1. Start the Configuration/Setup Utility program.
		2. Enable the DIMM.
		3. Save the configuration and restart the server.
	v If you continue to get this error, replace the DIMM.
Microprocessor problems	The startup (boot) microprocessor is not working properly.
The server indicates a	Verify that all microprocessors are seated properly. If they are, replace the failed
microprocessor error during
	microprocessors.
POST.
The server does not recognize	1.	Reseat microprocessors and power modules.
all installed processors (loose
	2.	Check for bent pins on microprocessors.
connection; bent pin(s) on
	3.	Check cable connections from processor board to power modules.
processor(s))
Monitor problems	Some IBM monitors have their own self-tests. If you suspect a problem with
	your monitor, see the information that comes with the monitor for adjusting
	and testing instructions.
	1.	Monitor.
Testing the monitor.
	2.	Run the AMIDiag program. If diagnostics pass, the problem might be a video
		driver.
	3.	I/O board.
The screen is blank.	Make sure that:
	1.	The server power cord is plugged into the server and a working electrical
		outlet.
	2.	The monitor cables are connected properly.
	3.	The monitor is turned on and the brightness and contrast controls are adjusted
		correctly.

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