IBM Type 7977 manual Microprocessor problems, Monitor problems, Symptom, Action

Microprocessor problems

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.

Symptom	Action
The server emits a continuous	1.	Correct any errors that are indicated by the light path diagnostics LEDs (see
beep during POST, indicating
		“Light path diagnostics LEDs” on page 91).
that the startup (boot)
	2.	Make sure that the server supports all the microprocessors and that the
microprocessor is not working
		microprocessors match in speed and cache size.
correctly.
	3.	(Trained service technician only) Reseat Microprocessor 1
	4.	(Trained service technician only) If there is no indication of which
		microprocessor has failed, isolate the error by testing with one microprocessor
		at a time.
	5.	Replace the following components one at a time, in the order shown, restarting
		the server each time:
		a. (Trained service technician only) microprocessor 2
		b. VRM 2
		c. (Trained service technician only) System board
	6.	(Trained service technician only) If there are multiple error codes or light path
		diagnostics LEDs that indicate a microprocessor error, reverse the locations of
		two microprocessors to determine whether the error is associated with a
		microprocessor or with a microprocessor socket.
		v If the error is associated with a microprocessor, replace the microprocessor.
		v If the error is associated with a VRM, replace the VRM.
		v If the error is associated with a microprocessor socket, replace the system
		board.

Monitor problems

Some IBM monitors have their own self-tests. If you suspect a problem with your monitor, see the documentation that comes with the monitor for instructions for testing and adjusting the monitor. If you cannot diagnose the problem, call for service.

82IBM System x3500 Type 7977: Installation Guide