HP xw4000 Getting Started Manual page 26

basic troubleshooting
solving general problems (continued)
problem
Computer powered off
automatically and the
Power LED is:
1. Flashing Red or
Yellow four times
per second, OR
2. Flashing Red or
Yellow two times
one second apart,
followed by a two
second pause, OR
3. Not flashing.
Computer date and
time display is incorrect.
Computer appears to
pause periodically.
3–4
cause
Ä
CAUTION: When attempting to resume from Stand By mode,
do not hold down the power button for more than four seconds.
Otherwise, Stand By mode is lost, and you will lose your data.
The unit temperature was
exceeded. The fan may
be blocked or not turning,
OR the heatsink is not
properly attached to the
processor.
The unit temperature was
exceeded because the
computer was functioning
with the cover or access
panel removed.
RTC (real-time clock)
battery may need to be
replaced. Battery life is
approximately 3–5 years.
Network driver is loaded
and no network
connection is established.
solution
1. Unit is in an exceedingly hot
environment. Let it cool down.
2. Ensure that computer air vents
are not blocked and internal
fans are running (i.e. power
supply fan, chassis fan, and/or
processor fan).
3. Ensure that the heatsink is
properly seated.
4. Contact an authorized reseller or
service provider.
Replace cover or access panel, and
let the computer cool down before
attempting to turn on power to the
computer.
First, reset the date and time. If the
problem persists, replace the RTC
battery. Refer to the Hardware
Reference Guide for instructions on
installing a new battery, or contact an
authorized dealer or reseller for RTC
battery replacement.
Establish a network connection, or
use Computer Setup (F10) to disable
the network controller.
getting started guide