Noise Problem Pic 0050 - IBM 6150 Hardware Maintenance Manual

Noise Problem PIC 0050
Step 1
Use this PIC to find the FRU that is causing a loud noise.
The device causing the noise can be identified by removing devices from the
system unit.
IS THE NOISE COMING FROM THE SYSTEM UNIT?
NO Go to "Step 5" on page 3-0050-5.
YES Continue on the next page.
(9/86) Problem Isolation Charts 3-0050-1