IBM 3270 Maintenance Manual page 20

_ Check the inside of the system unit for loose
or open connectors.
_ Replace the cover on the system unit, and
fasten securely using the five screws which
were removed earlier.
_ If the workstation has a printer, check the
continuity of the power cord from the ground
pin to the frame. The resistance should be
less than 0.1 ohms.
_ Install the power cord(s) and plug them into
the power outlets.
_ Power up the workstation and observe the
results of the POST test on the CRT screen.
(See Section 1 of the IBM 3270 Personal
Computer Guide to Operations)
Abbrevia tions
CRT - cathode ray tube
OEM - original equipment manufacturer
POST - power on self test
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