Acer ASPIRE Z3750 Service Manual page 86

Index of Symptom-to-FRU Error Messages
To use the information in this section to diagnose a problem:
1. Find the error symptom in the left column.
2. If directed to a check procedure, replace the FRU indicated in the check procedure.
If no check procedure is indicated, the first Action/FRU item listed in the right column is the most likely
cause.
NOTE If you cannot find a symptom or an error in this list and the problem remains, see "Undetermined
Problems" on page 65.
Processor/Processor Fan-related Symptoms
Symptom/Error
Processor fan does not run but power
supply fan runs.
Processor test failed.
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.
Mainboard and Memory-related Symptoms
Symptom/Error
Memory test failed.
Incorrect memory size shown or repeated
during POST.
System works but fails to enter power
saving mode when the Power Management
Mode is set to Enabled.
Blinking cursor only; system does not work. • IDE drive connection/cables
NOTE Ensure the memory modules are installed properly and the contact leads are clean before
diagnosing any system problems.
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Action/FRU
• Ensure the system is not in power saving mode.
• With the system powered on, measure the voltage of the
processor fan connector. Its reading should be +12Vdc. If the
reading shows normal, but the fan still does not work, then
replace the heat sink fan.
• Mainboard
• Processor
• Mainboard
Action/FRU
• Memory module
• Mainboard
• Insert the memory modules in the DIMM sockets properly,
then reboot the system.
• Memory module
• Mainboard
• Enter CMOS Setup and load the default settings. In Windows
systems, check settings in Power Management Property of
the Control Panel.
• Reload software from Recovery CD.
• IDE disk drives
• See "Undetermined Problems".
• Mainboard
Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide