Power Systems Checkout (8554)

1.  Replace the failing FRU if the power supply problem is caused by  a short circuit.
2.  Determine if one (or all) of the batteries have become discharged.  Replace a discharged battery with a known-good spare.
3.  Observe the Battery ID indicators or swap the two battery packs  to determine which one has become discharged.

 +---+
 |001|
 +---+
 DID THE PROBLEM OCCUR ONLY WHEN USING THE AC ADAPTER ?
           +---+
  Yes   No-+002| Go to Step 004
 +-+-+     +---+
 |003|
 +---+
 Go to 'Testing the AC Adapter', If that does not
  correct the problem, replace the voltage converter.
 -----------------------------------------------------------------------
 +---+
 |004|
 +---+
 DID THE PROBLEM OCCUR ONLY ON BATTERY POWERED OPERATION ?
           +---+
  Yes   No-+005| Go to Step 007
 +-+-+     +---+
 |006|
 +---+
 - Make sure the battery packs are fully charged.
 - Go to 'Testing the Battery Pack' and check the battery packs.
   If that does not correct the problem,
   replace the voltage converter.
 -----------------------------------------------------------------------
 +---+
 |007|
 +---+
 DO ALL SYSTEM STATUS INDICATORS REMAIN OFF AFTER POWER ON ?
           +---+
  Yes   No-+008| Go to Step 016
 +-+-+     +---+
 |009|
 +---+
 - Remove the following if installed:
  ° Battery packs
  ° Backup battery
  ° IC DRAM card
  ° Internal Data/Fax modem
  ° Serial adapter
  ° Numeric keypad
  ° Math coprocessor
  ° Mouse
  ° External display
 - Go to Step 010
 -----------------------------------------------------------------------
 +---+
 |010|
 +---+
 - Plug in the AC adapter and power-on the computer.
 DOES ANY INDICATOR REMAIN ON ?
            +---+
  Yes    No-+011|
   |        +---+
   |            - Power-off the computer and remove the following.
   |
   |              ° Hard disk drive
   |              ° Diskette drive
   |              ° LCD cables
   |              ° Keyboard flexible cables
   |
   |            - Power-on the computer again.
 +-+-+          - Go to Step 013
 |012|
 +---+
   Suspect one of the options or devices.
 - Reinstall each of the options or devices to the computer one at a
   time, and power-on the computer to see if the original problem occurs.
 - Replace the last installed option or device when the
   problem occurs.
 -----------------------------------------------------------------------
 +---+
 |013|
 +---+
 DOES ANY INDICATOR REMAIN ON ?
            +---+
  Yes    No-+014|
   |        +---+
   |            - Replace the following FRUs one at a time
   |              until the problem is corrected
   |
   |              ° Indicator card
   |              ° System board
 +-+-+            ° Voltage converter
 |015|
 +---+
   Suspect one of the devices.
 - Reinstall each of the devices to the computer one at a time, and
   power-on the computer to see if the original problem occurs.
 - Replace the last installed device when the problem occurs.
 -----------------------------------------------------------------------
 +---+
 |016|
 +---+
 - Observe the system-status indicators for about
   1 second after power on.
   System-Status Indicator   Condition A   Condition B
   ---------------------------------------------------
   Power-On                  Off           On
   Suspend Mode              Off           On
   Scroll Lock               On            Off
   Caps Lock                 On            Off
   Numeric Lock              On            Off
   Diskette Drive            On            Off
   Hard Disk Drive           On            Off
   Battery ID 2              Off           On
   Battery Status 2          Off           On
   Battery ID 1              Off           On
   Battery Status 1          Off           On
   Carrier Detect            -             -


If the status lights match either condition A or B, replace the voltage converter. If the status lights are different from condition A or B, or replacing the voltage converter does not correct the problem, go to 'Undetermined Problem'

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