IBM 9080-M9S Manual page 262

Figure 221. Activating the identify LED for a faulty part
9. Look for the flashing amber LED of the faulty or failed memory voltage regulator module. Memory
voltage regulator module are in locations P1–C54, P1–C55, P1–C57, P1–C58, P1–C64, P1–C67, and
P1–C68. Refer to the following image.
256 Power Systems: Removing and replacing parts in the 9080-M9S system