Power Systems Checkout (8573)

Power Systems Checkout

To check the power supply voltages, do the following:

NOTE: If you cannot power-on the computer, a motor-start jumper might be installed on the hard disk drive. Remove the motor-start jumper.
  1.  Power-off the computer.
  2.  Unplug the two power-supply connectors.
  3.  Power-on the computer and check for the voltages listed below.

Vdc Minimum Vdc Maximum Ground (-) Pin Positive (+) Pin
+4.8 +5.2 6, 7 or 8 3, 4, or 5
+11.5 +12.6 6, 7 or 8 2
+11.0 +12.9 6, 7 or 8 1


System Unit Fan

A non-functioning fan can cause heat to build up resulting in intermittent problems.

If the fan is not running, replace the power supply.

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