Power Systems Checkout (8543)



Power Systems Checkout

NOTE: One or all of the batteries can discharge if there is a short circuit in the computer.
  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 (or recharge the main or standby battery.)


The test procedures for each power supply are found on the following pages.


None of the above? Follow the steps below.

 +---+
 |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 system board.
 +---+
 |004|
 +---+
 DID THE PROBLEM OCCUR ONLY WHEN USING THE BATTERY ?
           +---+
  Yes   No-+005| Go to Step 011
   |       +---+
 +-+-+
 |006|
 +---+
 DOES A FULLY-CHARGED BATTERY DISCHARGE QUICKLY ?
           +---+
  Yes   No-+007| Go to Step 010
   |       +---+
 +-+-+
 |008|
 +---+
 - Run advanced diagnostics for all devices using the AC adapter.
   Use the RUN TEST ONE TIME option.
 DID ALL THE TESTS END WITHOUT AN ERROR ?
           +---+
  Yes   No-+009| Follow the instructions on the screen.
   |       +---+ If the instructions do not appear or do not correct
 +-+-+           the problem, replace the system board.
 |010|
 +---+
 Go to 'Testing the Rechargeable Battery'.  If that does
 not correct the problem, replace the system board.
 +---+
 |011|
 +---+
 - Remove the following if installed:
  ° Rechargeable battery
  ° Standby battery
  ° Backup battery
  ° Memory module kits in connectors 1 and 2
  ° Internal Data/Fax Modem adapter
  ° Serial adapter
  ° Numeric keypad
  ° TrackPoint
  ° Mouse
  ° External keyboard
  ° External CRT display
  ° Cables to the hard disk drive
  ° Cables to the diskette drive
  ° Power cable to the LCD
  ° Signal cables to the LCD
 - Connect the AC adapter and power-on the computer.
 DID YOU HEAR ONE LONG OR TWO SHORT BEEPS?
           +---+
  Yes   No-+012| Replace the system-status display to verify the fix.
   |       +---+ If the problem still remains, put back the original
 +-+-+           system-status display, then replace the system board.
 |013|
 +---+
 - 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.


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