Voltage Readings
Voltage measurement can help isolate the cause of a malfunction.
Usually if power supply voltage as measured at the test points is
out of tolerance, but is readable on the meter, suspect the power
supply as the cause of the problem.
If no voltage appears, or voltage appears intermittently, a shorted
or open cable, malfunctioning peripheral or the power supply may
be the cause.
CAUTION
If you suspect a short circuit in a cable or peripheral, it is impera-
tive that the short circuit be removed before installing replacement
parts and powering the unit up. Failure to remove a short circuit
may cause damage to the replacement parts or greater damage to
the unit when power is applied.
IMPORTANT
In testing, do not neglect the obvious: Is the unit plugged into a
live wall outlet? Is AC power reaching the power supply? Is the
monitor getting power? If you cannot boot the system from the
keyboard power-on switch, make sure both ends of the keyboard
cable are securely plugged in.
Genesis MP
Appendix C
◆
77
Appendix C
∆
!
∆
!
