HP dx2480 Hardware Reference Guide: HP Compaq dx2480 Business Desktop MIcrotow - Page 79

Troubleshooting Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Blue Power LED On. None Computer on. None Blue Power LED flashes None every two seconds. Computer in Press any key or move the Suspend to RAM mouse to wake the computer. mode (some models only) or normal Suspend mode. CPU Fan weak (RPM < 2 1000) or not turning, Display Warning message and Long Beep for 5 sec and shut down. Processor thermal 1. Ensure that the computer protection activated: air vents are not blocked A fan may be and the processor cooling blocked or not fan is running. turning. OR The 2. Open hood, press power heatsink/fan button, and see if the assembly is not processor fan spins. If the properly attached to processor fan is not the processor. spinning, make sure the fan's cable is plugged onto the system board header. Ensure the fan is fully/properly seated or installed. 3. If fan is plugged in and seated properly, but is not spinning, then replace processor fan. 4. Reseat processor heatsink and verify that the fan assembly is properly attached. 5. Contact an authorized reseller or service provider. System Fan not turning, 2 Display Warning message and Long Beep for 5 sec and shut down Blue Power LED flashes five times, one every second, followed by a 2 second pause. Also 5 simultaneous beeps will be heard. Thermal protection 1. Open hood, press power activated: System fan button, and see if the may be blocked or system fan spins. If the not turning. OR The system fan is not spinning, system fan is not make sure the fan's cable is properly connected plugged onto the system to the system board. board header. 2. Ensure that no foreign objects are stuck in the System Fan. 3.If still it does not spins, replace the the System fan or contact an authorized reseller or service provider Pre-video memory error. 1. Reseat DIMMs. Power on the system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Troubleshooting Guide www.hp.com/in 8-18