HP ProSignia 320 Desktop PC 6433C Compaq Deskpro Family of Personal Computers, - Page 51

Power Supply

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Solving General Problems Continued Problem Computer does not boot up and Num Lock LED is blinking; you may hear one short and two long beeps. Possible Solution 1. System memory may be improperly installed or may be bad. 2. See "Error Messages" Flowchart. The Caps Lock LED is flashing; you may hear one long and two short beeps. 1. The video controller is not present or is incorrectly initialized. 2. Clear CMOS. 3. If a video board has been added, remove and reseat it. 4. See "No Video" Flowchart. Computer does not boot up and the Scroll Lock LED is flashing; you may hear two long and one short beeps. 1. System board hardware failure (prior to video). Replace system board. 2. See "Initial Troubleshooting" Flowchart. ✎ If the standard keyboard has been replaced with a Universal Serial Bus (USB) keyboard, you will hear the beep sequences mentioned above but will not see the flashing lights. Power Supply Problem Computer will not turn on. Possible Solution 1. Computer not connected to active external power source. Connect power cable to active wall plug or power strip. 2. Power switch not connected to system board. Plug the power switch cable into the system board. 3. Power line selector switch on rear of computer set to wrong voltage. Select the proper AC voltage (115V or 230V). Power LED blinks red once every 2 seconds. 1. Power supply overloaded or short detected. Unplug computer from AC power source. Unplug internal power cables from all devices and unplug PCI cards. Reconnect devices one at a time to identify the cause. 2. Diskette drive power cable not properly connected. Ensure that all 4 pins on the drive are connected to the power cable connector. 3. Power supply shuts down after system warms up. Thermal overload caused by bad fan. Replace power supply. 4. Power supply will not turn on because of internal power supply fault. Replace power supply. Power supply shuts down intermittently. 1. Power line selector switch on rear of computer set to wrong voltage. Select the proper AC voltage (115V or 230V). 2. Power supply will not turn on because of internal power supply fault. Replace power supply. Quick Troubleshooting Guide A-3

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Quick Troubleshooting Guide
A-3
Solving General Problems
Continued
Problem
Possible Solution
Computer does not boot up
and Num Lock LED is blinking;
you may hear one short and two
long beeps.
1. System memory may be improperly installed or may be bad.
2. See
“
Error Messages
”
Flowchart.
The Caps Lock LED is flashing;
you may hear one long and two
short beeps.
1. The video controller is not present or is incorrectly initialized.
2. Clear CMOS.
3.
If a video board has been added, remove and reseat it.
4. See
“
No Video
”
Flowchart.
Computer does not boot up and
the Scroll Lock LED is flashing;
you may hear two long and one
short beeps.
1. System board hardware failure (prior to video). Replace system
board.
2. See
“
Initial Troubleshooting
”
Flowchart.
✎
If the standard keyboard has been replaced with a Universal Serial Bus (USB) keyboard,
you will hear the beep sequences mentioned above but will not see the flashing lights.
Power Supply
Problem
Possible Solution
Computer will not turn on.
1. Computer not connected to active external power source. Connect
power cable to active wall plug or power strip.
2. Power switch not connected to system board. Plug the power switch
cable into the system board.
3. Power line selector switch on rear of computer set to wrong voltage.
Select the proper AC voltage (115V or 230V).
Power LED blinks red once every
2 seconds.
1. Power supply overloaded or short detected. Unplug computer from
AC power source. Unplug internal power cables from all devices and
unplug PCI cards. Reconnect devices one at a time to identify the
cause.
2. Diskette drive power cable not properly connected. Ensure that all 4
pins on the drive are connected to the power cable connector.
3. Power supply shuts down after system warms up. Thermal overload
caused by bad fan. Replace power supply.
4. Power supply will not turn on because of internal power supply fault.
Replace power supply.
Power supply shuts down
intermittently.
1. Power line selector switch on rear of computer set to wrong voltage.
Select the proper AC voltage (115V or 230V).
2. Power supply will not turn on because of internal power supply fault.
Replace power supply.