IBM 8122, 8138, 8131, 8123, 8137, 8124 manual Replacing hardware

2.To access the 12 V power connector, remove the lower drive cage thumb-screw and slide the lower drive cage toward the rear and out of the bay. Place the drive cage out of your way without disconnecting the drive signal cables.

3.Disconnect the power supply cables
1 and
2 from the system board.

4.Disconnect the power cable from each of the drives. Note the location of each cable that is disconnected.

Chapter 2. Replacing hardware 9