IBM 5531 Operator's Manual page 125

Problem Determination Procedures
Test 2400 - Enhanced Graphics Adapter
(continued)
13. Did the following appear on your screen?
YES - Press Y, then press the Enter key. Continue with the next step.
NO -
Press N; then press the Enter key. Record the error message, and have the unit
that contains the adapter serviced.
5-2400-12
Operator's Guide