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6-7
Problem Solving
Preparing the System for Diagnostic Testing
To prepare the system for diagnostic testing, perform
the following:
Notice: Before disconnecting any peripheral cables
from the system, turn off the system and any external
peripheral devices. Failure to do so can cause
permanent damage to the system and/or the peripheral
devices.
1. Turn off the system and all external peripheral
devices. Disconnect all devices from the system
except the keyboard and video monitor.
2. Make sure the system power cord is plugged into a
properly grounded AC outlet.
3. Make sure your video display monitor and keyboard
are correctly connected to the system. Turn on the
video monitor. Set its brightness and contrast
controls to at least two-thirds of their maximum
ranges (refer to the documentation supplied with
your video display monitor).
4. If the operating system normally loads from the hard
disk drive, make sure there is no diskette in drive A.
Otherwise, place a diskette containing the operating
system files in drive A.
5. Turn on the system. If the power indicator LED does
not light, refer to Power Light Does Not Light found
later in this chapter.