IBM RT PC Problem Determination Manual page 63

Two-Digit Service Request
Display N um ber or Problem
89 12-F4A-100
8c 11-8EA-100
8u 11-18A-100
90 12-850
93' 12-64A-F80
12-FB0-F80
95
9c 12-3 E X )
16-986
c6
cc E2-5D0
cu E2-650
uc 12-2E0
uu 72-2F0
Any 16-84A-630-100
Other
Number
Check for a write-protect tab on the diskette.
Unit to be Serviced
or Problem Solution
System Unit
System Unit
System Unit
System Unit
System Unit
System Unit
System Unit or IBM 6192
System Unit
Portable Disk Drive
Enclosure
Portable Disk Drive
Enclosure
System Unit
IBM 6192
System Unit
Section 2. Hardware Problems
2-35