IBM 9080-M9S Manual page 356

Figure 301. Activating the identify LED for a faulty part
9. Look for the flashing amber LED of the faulty or failed miscellaneous B voltage regulator module. The
miscellaneous B voltage regulator module is in location P1–C59. Refer to the following image.
350 Power Systems: Removing and replacing parts in the 9080-M9S system