Panasonic CF-18 Series Reference Manual page 91

List of Error Codes
Error Code/Message
Operating System not found
Action
The OS is not properly installed on the floppy disk or the
hard disk that you are trying to boot from.
If the computer cannot be booted from the floppy
disk, check the floppy disk drive to ensure that the
disk is in fact bootable, and change it to another if
not.
If the computer cannot be booted from the hard disk,
confirm whether the hard disk is properly recognized
in [Information] menu of the Setup Utility.
If the hard disk is recognized, perform the
reinstallation procedure. If not, contact Panasonic
Technical Support.
If a device is connected to the USB port, disconnect
the device, or run the Setup Utility and set [Legacy
USB Support] in [Advanced] menu to [Disable].
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