IBM 6150 Hardware Maintenance Manual page 273

Step 10
1. Set the system unit power switch to Off.
2. Install the adapter removed from slot 1.
3. Be sure the power has been off 30 seconds, then set the system unit
power switch to On.
4. Wait 15 seconds, then answer the following question.
bJD
IS THE POWER-ON INDICATOR ON?
NO Go to "Step 12" on page 3-8800-12.
YES Continue on the next page.
3-8800-10 Service Manual