Acer Altos R720 Series User Manual page 151

Hard drives are not recognized.
Do the following:
• Make sure the disk controller is not disabled in the BIOS setup.
• Make sure the drive is compatible.
Bootable CD drive is not detected.
Make sure the Boot Options setting in the BIOS setup utility is
configured to allow the CD drive to be the first bootable device.
New memory modules installed are not detected.
Do the following:
• Make sure the memory modules are properly seated on the DIMM
slots.
• Make sure the memory modules comply with the system
requirements.
• Make sure the memory modules have been populated according
to the system requirements.
External device connected to a USB connector does not work.
Do the following:
• Reduce the number of external devices connected to a USB hub.
• Refer to the documentation that came with the device.
Server cannot connect to a network
• Make sure the network cable is securely attached to the correct
connector at the system rear panel.
• Try a different network cable.
• Make sure you are using the correct and the current drivers.
• Make sure the driver is loaded and the protocols are bound.
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