IBM Personal Computer XT Manual To Operations page 52

Personal Computer POST Errors
In the following examples, find your screen response
and audio response, then follow the instructions in the
box marked "Action."
Warning: If the instructions are to have a unit
serviced, and that unit has a fixed disk drive, we
recommend that you back up all disk files onto
diskettes. Normal shipping and handling can result
in permanent loss of data on your fixed disk drives.
Refer to the IBM DOS manual for a description of
the Backup command.
30-4 Start
April 1984