HP Xw4600 HP xw4600 Workstation - Service and Technical Reference Guide - Page 126
Solving diskette problems, Table 6-4
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Table 6-3 Power supply problems (continued) Problem Cause Solution Workstation powered off automatically and the Power LED flashes red 2 times (once every second), followed by a 2-second pause. Processor thermal protection 1. activated. A fan might be blocked or not 2. turning. OR The processor heatsink fan assembly is not properly 3. attached to the processor. 4. Be sure that the workstation air vents are not blocked and the cooling fan is running. Open the access panel, press the power button, and determine whether the processor fan spins. If the processor fan is not spinning, be sure the fan's cable is plugged into the system board header. Be sure the fan is properly seated or installed. Replace the processor fan. Reseat processor heatsink and verify that the fan assembly is properly attached. Power LED flashes red (once every Power failure (power supply is 1. 2 seconds). overloaded). Determine whether a device is causing the problem by removing all attached devices. 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 a failure occurs. Replace the device causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 2. Verify the power supply functionality. a. Disconnect AC power. b. Remove all internal power supply cables from the system board. c. Plug in AC power. ● If the power supply fan spins and the BIST LED illuminates, then the power supply is good. Replace the system board. ● If the power supply fan does not spin or the BIST LED does not illuminate, replace the power supply. Solving diskette problems Table 6-4 Diskette problems Problem Diskette drive light stays on. Drive not found. Diskette drive cannot write to a diskette. Cause Solution Diskette is damaged. Right-click Start, select Explore, and then select a drive. Select File>Properties>Tools. Under Error-checking, select Check Now. Diskette is incorrectly inserted. Remove and reinsert diskette. Files on diskette are damaged. Verify the program diskettes. Drive cable is not properly connected. Reconnect power cable. Be sure that all four pins are connected. Cable is loose. Reseat diskette drive data and power cables. Removable drive is not seated Reseat the drive. properly. Diskette is not formatted. Format the diskette. Diskette is write-protected. Use another diskette or remove the write protection. 116 Chapter 6 System diagnostics and troubleshooting ENWW