HP Dc5700 Quick Setup and Getting Started Guide - Enhanced for Accessibility - Page 27

Table 3 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Green Power LED flashes every two seconds. None Computer in Suspend to RAM mode (some models only) or normal Suspend mode. None required. Press any key or move the mouse to wake the computer. Red Power LED flashes 2 two times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Processor thermal 1. protection activated: A fan may be blocked or not turning. 2. OR The heatsink/fan assembly is not properly attached to the processor. 3. 4. Ensure that the computer air vents are not blocked and the processor cooling fan is running. Open hood, press power button, and see if the processor fan spins. If the processor fan is not spinning, make sure the fan's cable is plugged onto the system board header. If fan is plugged in, but is not spinning, then replace heatsink/fan assembly. Contact an authorized reseller or service provider. Red Power LED flashes 3 three times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Processor not installed (not an indicator of bad processor). 1. Check to see that the processor is present. 2. Reseat the processor. Red Power LED flashes 4 four times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Power failure (power 1. Open the hood and ensure the 4 or supply is 6-wire power supply cable is overloaded). 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. ENWW Basic Troubleshooting 19