Solving Power Problems - HP ProSignia 120 Maintenance And Service Manual

Solving Power Problems

Problem
Computer will not turn on.
Computer will not turn on
when connected to external
power if battery pack is in the
computer.
Computer turned off while it
was left unattended and the
power/suspend light is off.
Computer turned off while it
was left unattended and will
not turn on.
Computer initiated Suspend or
turned off when it was
docked.
Hibernation does not work
properly.
Computer does not turn on
when connected to external
power and no batteries are
installed.
2-30 Troubleshooting
Table 2-25
Solving Power Problems
Probable Cause
Computer is not connected to
a power source.
Power cord to the external
power source is unplugged.
Battery pack is discharged.
CMOS data is corrupt
Battery pack may be defective. Remove battery pack, insert another battery
System initiated Hibernation
after a preset timeout.
System initiated Hibernation
and/or shut down because of
a critical low-battery
condition.
The maximum operating
temperature was exceeded.
Hibernation was not reset after
a memory upgrade.
Internal power supply is bad.
Recommended Action(s)
Insert battery pack or connect an external
power source.
Ensure that power cord connecting the
computer and the external power source is
plugged in properly.
Insert a fully charged battery pack or connect
an external power source.
Flush CMOS memory.
pack, and try again.
Turn on the computer to restore information
at the point where Hibernation was initiated.
NOTE: To change the Hibernation timeout
setting in Windows 95, click the Hibernation
tab in Power Properties. In Windows NT, run
Computer Setup and select Power
Management.
Replace the battery pack with a fully charged
battery pack or connect an external power
source, then turn on the computer.
Computer is in a high temperature
environment and the fan is not able to cool
it. Let the computer cool down and turn it on
again.
Make sure the ventilation intake and exhaust
are not obstructed.
Reset Hibernation in the Power Management
utility.
Replace the internal power supply.