HP Dc7100 Getting Started - Business Desktops - Enhanced for Accessibility - Page 30

Getting Started Diagnostic Front Panel LEDs and Audible Codes Activity Possible Beeps Cause Recommended Action Red Power LED 4 flashes four times, once every second, followed by a two second pause. The beeps continue for five iterations, then stop. The LED flashes continue until the problem is resolved. ✎ Beeps may not occur on all models for this activity. Power failure (power supply is overloaded). 1. Open the hood and ensure the 4-wire power supply cable is seated into the connector on the system board. 2. 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. 3. Replace the power supply. 4. Replace the system board. 26 www.hp.com Getting Started