IBM 6151 Maintenance And Service Manual page 118

989
Missing Option
This SRA number indicates that an option was not detected by
the diagnostic routines. (This may be caused by incorrect
switch settings. If needed, see IBM RT PC Options
Installation.) Use the Show Installed Options Utility to
display the options installed. Find the options that are not
being detected. One of the undetected options is defective.
Exchange the undetected option, the cable attached to the
undetected option, or the adapter for the undetected option
until the defective component is isolated.
Additional Tests: None
Removal Procedure: See the procedure for the defective
component.
Repair Checkout: Run the System Checkout or the checkout
for the device.
98A
Format Fixed Disk
Analyze the SRA number for the fixed-disk drive and diskette
adapter in this SRN first, because this SRA number indicates
that some of the fixed disks must be formatted again.
All of the fixed disks attached to the fixed-disk and diskette
drive adapter identified by another SRA number within this
SRN, must be formatted after the adapter is exchanged. Go to
the SRA number for the fixed-disk and diskette drive adapter
identified in the SRN.
3-0020-40 Service Manual