IBM Type 7977 Error code, Description, Action, the Problem Determination and Service Guide on

vFollow the suggested actions in the order in which they are listed in the Action column until the problem is solved.

vSee the Problem Determination and Service Guide on the IBM System x Documentation CD to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).

vIf an action step is preceded by “(Trained service technician only),” that step must be performed only by a trained service technician.

Error code	Description	Action
198	Microprocessors are not the same speed	Install microprocessor of the same speed.
		Note: Do not mix dual-core and quad-core
		processors in the same system.
289	A DIMM has been disabled by the system.	1.	Replace the lowest-numbered pair of DIMMs with
			an identical known good pair of DIMMs; then,
			restart the server. If the beep code error remains,
			return one DIMM at a time from the failed pair to
			its connector, restarting the server after each
			DIMM, to identify the failed DIMM.
		2.	Make sure that the DIMM is installed correctly
			(see “Installing a memory module” on page 11).
		3.	Reseat the DIMM.
		4.	Replace the DIMM.
301, 303	Keyboard or keyboard controller error.	1.	If you have installed a USB keyboard, run the
			Configuration/Setup Utility program and enable
			keyboardless operation to prevent the POST error
			message 301 from being displayed during startup.
		2.	Reseat the keyboard.
		3.	Replace the following components, one at a time,
			in the order shown, restarting the server each
			time:
			a. Keyboard
			b. (Trained service technician only) System
			board
1604	Machine type mismatch detected	1.	Run the Configuration/Setup Utility program,
			select Load Default Settings, and save the
			settings.
		2.	Update the BIOS code and BMC firmware (see
			the Problem Determination and Service Guide on
			the IBM System x Documentation CD.
		3.	(Trained service technician only) Replace the
			system board.

Chapter 5. Solving problems 67