Short Circuit Test (2523)

1.  Visually check the cables, wires, and connecters for any  short circuits, open wires, and damage.  If a short circuit or burned parts are found, replace the parts.
2.  Disconnect, then reconnect all the external devices  from the computer one by one and see if the same symptom appears.  If you find that an external device has a problem, follow the maintenance  procedure for that device.
3.  If the same symptom remains with no external devices connected, the  problem is in the computer. Isolate  the failing component in the computer by changing the FRUs one by  one until you find the problem. Replace the DC/DC card and the  system board first.
    If the symptom is that the battery becomes low on  power quickly, and all the  tests run without detecting any errors, replace the battery pack first.