Solving Power Supply Problems - HP Xw4550 - Workstation - 2 GB RAM Technical Reference Manual

Table 5-2 Minor problems (continued)
Problem
Workstation seems to be locked
up.
Workstation date and time display
is incorrect.
Workstation appears to pause
periodically.
Cursor will not move using the
arrow keys on the keypad.
Poor performance is experienced. Processor is hot.
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.
System does not power on, and
the LEDs on the front of the
workstation are not flashing.

Solving power supply problems

This section presents troubleshooting information for power supply problems.
100 Chapter 5 System diagnostics and troubleshooting
Cause
Program in use has stopped
responding to commands.
Real-time clock (RTC) battery
might need to be replaced.
Network driver is loaded and no
network connection is
established.
The Num Lock key might be on.
Hard drive is full.
Processor thermal protection
activated.
A fan might be blocked or not
turning.
OR
The processor heatsink is not
properly attached to
the processor.
System unable to power on.
Possible Solution
1. Attempt the normal Windows shutdown procedure.
2. Restart the workstation using the power button.
1. Reset the date and time under Control Panel.
2. Replace the RTC battery.
Establish a network connection, or use the Computer Setup
(F10) Utility or Microsoft Windows Device Manager to
disable the network controller.
Press the Num Lock key. The Num Lock key can be
disabled (or enabled) in Computer Setup.
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.
Transfer data from the hard drive to create more space on
the hard drive.
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.
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.
ENWW