IBM 6151 Maintenance And Service Manual page 161

Step 29
The problem may be an incorrect switch or jumper setting on an
option, adapter, fixed-disk drive, or diskette drive. This may occur
in a new installation or after a new option is installed. Ask the
customer if this is a new installation or if a new option was added
to the system.
DO YOU SUSPECT A SWITCH OR JUMPER SETTING IS
THE PROBLEM?
YES
Switch and jumper settings depend upon the system
configuration. The
IBM RT PC Options Installation
manual shows the switch settings for different
configurations. Use the
IBM RT PC Options Installation
manual to check the jumper and switch settings on your
system; then continue on the next page.
NO
Go to "Step 31" on page 3-0030-31.
(6/88) Problem Isolation Charts 3-0030-29