HP Xw4550 HP xw4550 Workstation - Service and Technical Reference Guide - Page 108

Solving power supply problems - 5 beeps

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Table 5-2 Minor problems (continued) Problem Cause Possible Solution Workstation seems to be locked Program in use has stopped up. responding to commands. 1. Attempt the normal Windows shutdown procedure. 2. Restart the workstation using the power button. Workstation date and time display Real-time clock (RTC) battery is incorrect. might need to be replaced. 1. Reset the date and time under Control Panel. 2. Replace the RTC battery. Workstation appears to pause periodically. Network driver is loaded and no network connection is established. Establish a network connection, or use the Computer Setup (F10) Utility or Microsoft Windows Device Manager to disable the network controller. Cursor will not move using the arrow keys on the keypad. The Num Lock key might be on. Press the Num Lock key. The Num Lock key can be disabled (or enabled) in Computer Setup. Poor performance is experienced. Processor is hot. 1. Ensure airflow to the workstation is not blocked. 2. Ensure the fans are connected and working properly (some fans only operate when needed). 3. Ensure the processor heatsink is installed properly. 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 2 times, once every second, followed by a 2-second pause, and two simultaneous audible beeps. Processor thermal protection activated. A fan might be blocked or not turning. OR The processor heatsink is not properly attached to the processor. 1. Be sure workstation air vents are not blocked and the cooling fan is running. 2. Open the access panel, press the power button, and see if the processor fan spins. If not spinning, be sure the fan cable is plugged into the system board header. Ensure the fan is fully and properly seated or installed. 3. Replace the processor fan. 4. Reseat processor heatsink and verify that the fan assembly is properly attached. System does not power on, and the LEDs on the front of the workstation are not flashing. System unable to power on. Press and hold the power button for less than 4 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 4 seconds. If HDD LED does not illuminate, then: 1. Verify that the workstation is plugged into a working AC outlet. 2. Open the workstation 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. Solving power supply problems This section presents troubleshooting information for power supply problems. 100 Chapter 5 System diagnostics and troubleshooting ENWW

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Problem
Cause
Possible Solution
Workstation seems to be locked
up.
Program in use has stopped
responding to commands.
1.
Attempt the normal Windows shutdown procedure.
2.
Restart the workstation using the power button.
Workstation date and time display
is incorrect.
Real-time clock (RTC) battery
might need to be replaced.
1.
Reset the date and time under Control Panel.
2.
Replace the RTC battery.
Workstation appears to pause
periodically.
Network driver is loaded and no
network connection is
established.
Establish a network connection, or use the Computer Setup
(F10) Utility or Microsoft Windows Device Manager to
disable the network controller.
Cursor will not move using the
arrow keys on the keypad.
The
Num Lock
key might be on.
Press the
Num Lock
key. The
Num Lock
key can be
disabled (or enabled) in Computer Setup.
Poor performance is experienced.
Processor is hot.
1.
Ensure airflow to the workstation is not blocked.
2.
Ensure the fans are connected and working properly
(some fans only operate when needed).
3.
Ensure the processor heatsink is installed properly.
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 2 times, once every
second, followed by a 2-second
pause, and two simultaneous
audible beeps.
Processor thermal protection
activated.
A fan might be blocked or not
turning.
OR
The processor heatsink is not
properly attached to
the processor.
1.
Be sure workstation air vents are not blocked and the
cooling fan is running.
2.
Open the access panel, press the power button, and
see if the processor fan spins. If not spinning, be sure
the fan cable is plugged into the system board header.
Ensure the fan is fully and properly seated or installed.
3.
Replace the processor fan.
4.
Reseat processor heatsink and verify that the fan
assembly is properly attached.
System does not power on, and
the LEDs on the front of the
workstation are not flashing.
System unable to power on.
Press and hold the power button for less than 4 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 4 seconds.
If HDD LED does not illuminate, then:
1.
Verify that the workstation is plugged into a working AC
outlet.
2.
Open the workstation 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.
Solving power supply problems
This section presents troubleshooting information for power supply problems.
Table 5-2
Minor problems (continued)
100
Chapter 5
System diagnostics and troubleshooting
ENWW