IBM System p Series Cabling Manual page 66

Routing the cables through the cable-management arm
__ Is your server installed in a rack?
v No. Proceed to the next section, Starting your server.
v Yes. Do the following:
__ Put the system into the service position.
v For the models 510 and 510Q, see Place the model 9110-510 or OpenPower 710 in the service position.
v For the models 520, 520Q, 550, 550Q, 560Q, and 570, see Place the rack-mounted system or expansion
unit in the service position.
__ Route the cables through the hooks along the cable-management arm and secure them with the straps
provided.
__ After attaching the cables to the cable-management arm, go to the front of the rack and move the system
drawer in and out. Observe cables and cable-management-arm movement to verify that the cables are not
binding.
Starting your server
__ Power the system on (see Powering the system on and off).
Note: Expect a delay between the time when power is applied to the server or workstation and when an initial
program load (IPL) can be performed. When power is initially applied to the server or workstation, the service
processor performs a self-check and will leave the control panel blank for up to two minutes. Wait until the C1XX
XXXX progress codes are completed and 01 is displayed on the control panel before you perform an IPL or
change control panel functions.
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System i and System p: Cabling your server