Hitachi DS240 Service Manual page 171

T
ROUBLESHOOTING
Ensure that the correct thermal interface material or the thermal grease is applied to

the processor.
Ensure that the power supply fan is running.

Ensure that the air intakes for the fans are unobstructed.

Memory Issues
If you have installed incompatible memory modules, the system may not boot. Verify the
memory you've installed has been tested with your board. Refer to
for memory requirements. If the installed memory is compatible, remove and
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reinstall the memory modules. Defective memory modules may cause boot errors. To isolate
a specific memory module as defective, boot the system with just one memory module
installed at a time.
Power Supply, Chassis and Fan Issues
Ensure that the chassis power supply is appropriate for the system requirement.

Ensure all power cables and connectors are firmly connected to the power supply

and the AC outlet.
If the power supply or the AC outlet has an on/off switch, make sure that it is on and

verify that the outlet is supplying current.
Check for foreign objects inside the chassis such as screws that can short circuit

connections.
To isolate a specific PSU as defective, boot the system with just one PSU installed

at a time.
Check fan speed in WEBUI & event log to find out if there are any defective fans. If

a failure happens, contact your Hitachi sales representative for assistance.
Cable Issues
Ensure that all cable connections, both internal and external, are attached correctly and
securely.
Electrical Short or Overload
Remove nonessential items such as extra controller cards (e.g SAS 12G Mezz/B, 10G Mezz/
B) or HDD devices to check for shorts and overloads.
If the system fails to boot correctly, there may be a short or overload associated with one
of the components.
Replace each of nonessential items one at a time to isolate which one is causing
the problem.
S B I T
ERVER OOT SSUE OPICS
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