HP Dx5150 Troubleshooting Guide - Page 28

Power LED flashes Red four

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Troubleshooting Without Diagnostics Solving Power Supply Problems (Continued) Problem Cause Solution Power LED flashes Red four times, once every second, followed by a two-second pause. The Power LED will continue flashing until the problem is resolved. Power failure (power supply is overloaded). 1. Check that the voltage selector, located on the rear of the power supply (some models), is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Open the hood and ensure the 4-wire power supply cable is seated into the connector on the system board. 3. Check if a device is causing the problem by removing ALL attached devices (such as hard, diskette, or optical drives, and expansion cards). Power on the system. If the system enters the POST, then power off and replace one device at a time and repeat this procedure until failure occurs. Replace the device that is causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 4. Contact an authorized service provider to replace the power supply. 5. Replace the system board. 2-12 www.hp.com Troubleshooting Guide

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2–12
www.hp.com
Troubleshooting Guide
Troubleshooting Without Diagnostics
Power LED flashes Red four
times, once every second,
followed by a two-second
pause. The Power LED will
continue flashing until the
problem is resolved.
Power failure (power
supply is overloaded).
1. Check that the voltage selector,
located on the rear of the power
supply (some models), is set to
the appropriate voltage. Proper
voltage setting depends on your
region.
2. Open the hood and ensure the
4-wire power supply cable is
seated into the connector on the
system board.
3. Check if a device is causing the
problem by removing ALL
attached devices (such as hard,
diskette, or optical drives, and
expansion cards). Power on the
system. If the system enters the
POST, then power off and
replace one device at a time
and repeat this procedure until
failure occurs. Replace the
device that is causing the
failure. Continue adding devices
one at a time to ensure all
devices are functioning
properly.
4. Contact an authorized service
provider to replace the power
supply.
5. Replace the system board.
Solving Power Supply Problems
(Continued)
Problem
Cause
Solution