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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 Symptom 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 but power
supply fan runs. 1. Ensure the system is not in power saving mode. See
“Power Management” in chapter 2.
2. With the system power on, measure the voltage of processor
fan connector. Its reading should be +12Vdc. Its reading
should be +12Vdc. If the reading shows normal, but the fan
still does not work, then replace a good fan.
3. Main board.
Processor test failed. 1. Processor.
2. Main board.
Main board and Memory
NOTE: Ensure the memory modules are installed properly and the contact leads are clean before
diagnosing any system problems.
Memory test failed. 1. See "Memory"
2. Main board
Incorrect memory size shown or
repeated during POST. 1. Insert the memory modules in the DIMM sockets
properly, then reboot the system.
2. Memory module.
3. Main board.
System works but fails to enter power
saving mode when the Power
Management Mode is set to Enabled.
1. Enter BIOS Setup and load default settings.
In Windows Systems, check settings in Power
Management Property of Control Panel.
2. Reload software from Recovery CD.
Blinking cursor only; system does not
work. 1. Diskette/IDE drive connection/cables
2. Diskette/IDE disk drives
3. See “Undetermined Problems”.
4. Main board
Hard Disk Drive
NOTE: Ensure hard disk drive is configured correctly in BIOS Setup, cable/jumper are set correctly
before diagnosing any hard disk drive problems. (If only one drive is installed, please make sure
the drive is connected to master connector or the drive is set to master.)
Hard disk drive test failed. 1. Enter BIOS Setup and Load default settings.
2. Hard disk drive cable.
3. Hard disk drive.
4. Main board.
Hard disk drive cannot format
completely. 1. Enter BIOS Setup and Load default settings.
2. Hard disk drive cable.
3. Hard disk drive.
4. Main board.
Hard disk drive has write error. 1. Enter BIOS Setup and Load default settings.
2. Hard disk drive.
Hard disk drive LED fails to light, but
system operates normally. 1. With the system power on, measure the voltage of hard disk
LED connector.
2. Hard drive LED cable.