IBM Aptiva 2124, Hardware Maintenance Service

Page: 101 / 310

Check Procedures 2-37
Power Supply
001 - START
−
Check the Power Override switch, situated at the back of the
machine, just above the connector for the power cable. If this
switch is activated (switched to on), no power will be supplied to the
system.
−
Power off the system unit.
−
Check the power cord for continuity. Replace if necessary.
−
Check for the correct line voltage from the power outlet, and verify
that the voltage selector switch (if present) is set to the correct
voltage.
−
Power on the system unit.
002 - DOES THE POWER SUPPLY FAN RUN? (YES, GO TO STEP 003.
NO, GO TO STEP 004)
003 - DOES THE SYSTEM FAIL TO SHUT OFF WHEN THE ON/OFF
SWITCH IS PRESSED? (YES, READ AHEAD. NO, GO TO STEP
005)
−
You might have a damaged on/off switch cable assembly.
−
Disconnect the on/off switch cable assembly connector from the
power supply connector and take an ohm reading.
−
Go to step 007.
004 -
−
Disconnect the power cord from the back of the system unit.
−
Disconnect all power and switch cable connectors from the system
board and the power supply except the ATX power connector and
on/off switch connector.
−
Disconnect the power connectors to all drives.
−
Connect any one of the power connector to system board or drive
as power load for driving up power supply.
−
Reconnect the power cord.