IBM 2274 manual Error Symptoms List, Error Symptoms Action/FRU Processor / Processor Fan

Table 2-3 Error Symptoms List

NOTE: To diagnose a problem, first find the error symptom in the left column. If directed to a check procedure, replace the FRU indicated in the check procedure. If no check procedure is indicated, the first Action/ FRU listed in right column is the most likely cause.

Error Symptoms Action/FRU

Processor / Processor Fan

NOTE: Normally, the processor fan should be operative, and the processor clock setting should be exactly set to match its speed requirement before diagnosing any processor problems.

Processor fan does not run	1.	Ensure that the system is
but power supply fan runs.		not in power saving mode
		and the “Stop CPU clock
		in sleep state” is not set
		to Yes. See “Power
		Management” on page 5.
	2.	With the system power
		on, measure the voltage
		of processor fan
		connector FN2. Its
		reading should be
		+12Vdc. See “System
		Board Jumpers and
		Connectors” on page
		109.
	3.	Processor fan.
	4.	System board.
Processor test failed.	1.	Processor.
	2.	System board.

System Board and Memory

NOTE: Ensure that the memory modules are installed properly and the contact leads are clean before diagnosing any system problems.

Memory test failed.	1.	See “Memory” on page
		65.
	2.	System board

Check Procedures 45