IBM 7026-H80 - RS/6000 - 256 MB RAM Service Manual page 142

Step 1540-15
Perform the following to deconfigure the primary I/O drawer:
1. Turn off the power.
2. If you have not already done so, reset the service processor settings with the
instructions in step 6 on page 113. Then return here and continue.
3. Exit the service processor menus, and remove the ac power cables from the CEC
drawer and the I/O drawer.
Attention:
connected to other CEC drawers or other third-party drawers attached to the power
distribution unit (PDU). To avoid removing power from drawers that are used by
other systems, when you are instructed to unplug power from an I/O drawer,
remove only the PDU side of the single ac cables connected to the I/O drawer in
question.
4. If a display adapter with keyboard and mouse connected to the primary I/O drawer
is being used as the console, locate a standalone serial terminal (possibly a 3151)
and connect to the S1 serial port.
5. Remove the keyboard and mouse, if they are attached to the primary I/O drawer.
6. Leave the remaining external cables (RIO-port0, V/S COMM, RIO-port1, and JTAG)
connected.
7. Disconnect the diskette drive cable from the diskette drive connector on the primary
I/O drawer backplane.
8. Disconnect the boot devices, if present, other than the device used for booting.
9. Plug in the ac power cables for the CEC drawer and the I/O drawer. The primary
I/O drawer operator panel momentarily displays an OK prompt.
Are there any adapters in slots 1, 2, 3, or 4?
NO
YES
Step 1540-16
Are there any adapters in slots 5, 6, 7, 8 or 9?
NO
YES
Step 1540-17
Are there any adapters in slots 10, 11, 12, 13 or 14?
NO
YES
124
Service Guide
The rack that you are working on may have I/O drawers that are
Go to "Step 1540-16".
Go to "Step 1540-18" on page 125.
Go to "Step 1540-17".
Go to "Step 1540-19" on page 125.
Go to "Step 1540-23" on page 129.
Go to "Step 1540-20" on page 126.