HP Xw8400 HP xw8400 Workstation - Service and Technical Reference Guide - Page 120
System diagnostics and troubleshooting, Minor problems continued - 6 beeps
UPC - 883585271085
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Table 5-3 Minor problems (continued) Problem Cause Possible Solution Poor performance is experienced. Processor is hot. 1. Be sure airflow to the workstation is not blocked. 2. Be sure the fans are connected and working properly (some fans only operate when needed). 3. Be sure the CPU heatsink is installed properly. There is not enough memory. CAUTION: Disconnect AC power from the workstation before reseating or replacing components because there is power to the system board even when the workstation is powered down. Add more memory. Hard drive is full. Transfer data from the hard drive to create more space on the hard drive. Workstation powered off automatically and the Power LED flashes Red two times, once every second, followed by a two-second pause, and two simultaneous beeps are heard. Processor thermal protection activated: A fan might be blocked or not turning. OR CAUTION: Disconnect AC power from the workstation before reseating or replacing components because there is power to the system board even when the workstation is powered down. 1. Be sure workstation air vents are not blocked and the cooling fan is running. The CPU heatsink is not properly 2. attached to the processor. Open the hood, press the power button, and determine if the processor fan spins. If not spinning, be sure the fan's cable is plugged into the system board header. Be sure the fan is fully/properly seated or installed. 3. Replace the processor fan. 4. Reseat CPU heatsink and verify that the fan assembly is properly attached. System does not power on and System unable to power on. the LEDs on the front of the workstation are not flashing. CAUTION: Disconnect AC power from the workstation before reseating or replacing components because there is power to the system board even when the workstation is powered down. Press and hold the power button for less than four seconds. If the hard drive LED turns green, then: 1. Remove the expansion cards. 2. Replace the system board. OR Press and hold the power button for less than four seconds. If the HDD LED does not illuminate, then: 1. Verify that the unit is plugged into a working AC outlet. 2. Open the access panel, and verify that the power button harness is properly connected to the inline front panel I/O device assembly connector. 3. Verify that the power supply cables are properly connected to the system board. 4. Verify power supply functionality: a. Disconnect AC power. b. Remove all internal power supply cables from the system board. c. Plug in AC power. 110 Chapter 5 System diagnostics and troubleshooting ENWW