HP A1210n - Pavilion - 512 MB RAM Troubleshooting Manual page 20

Power
Symptom
PC will not turn on or start.
Invalid system disk
Or
Non-System disk or disk
error message displays.
PC appears locked up and
won't turn off when the On
button is pressed.
PC powered off
automatically.
16
PC Troubleshooting Guide
Possible cause
PC is not securely connected to
an external power source.
Green power supply light on
back of PC is out.
Monitor is not connected or is
not on.
Line voltage selection switch is
not in the proper position for
your country/region
(115V /230V ).
Wall outlet is defective.
Wrong memory modules were
used in an upgrade, or
memory modules were
installed in the wrong location.
Hard disk drive is damaged.
After an upgrade or repair, the
drive power, data, or power
supply cables may not be
properly connected.
A diskette has been left in the
drive during startup.
PC is not working.
The PC temperature was
exceeded.
The PC temperature was
exceeded because the PC was
functioning with the cover or
access panel removed.
Processor or system fan has
failed.
Solution
Ensure that cables connecting the PC to the external power
source are plugged in properly.
When the cables connecting the PC to the external power
source are plugged in properly and the wall outlet is
functioning, the green power supply light should be on;
if the light is not on, refer to the Warranty and Support
Guide to contact Support.
Connect the monitor to the PC, plug it in, and turn it on.
Set the line voltage selection switch to the correct setting
for your country/region, or refer to the Warranty and
Support Guide to contact Support.
Test the outlet by connecting a different electrical device to
the outlet.
Reinstall the old memory to return your PC to its original
state. Refer to the Upgrading and Servicing Guide for
instructions.
Press the Help ? button on the keyboard to open the Help
and Support Center, or refer to the Warranty and Support
Guide to contact Support for replacement details.
Reseat drive power, data, and power supply cables. See
the Upgrading and Servicing Guide for instructions.
When drive activity stops, remove the diskette and press
the spacebar. The PC should start up.
Press and hold the On button until the PC turns off.
The PC is in an exceedingly hot environment. Let it
cool down.
Ensure PC air vents are not blocked and internal fan is
running. Note that your PC may not have an internal fan.
Replace cover or access panel, and let the PC cool down
before attempting to turn on power to the PC.
Refer to the Warranty and Support Guide to contact
Support for replacement details. Note that your PC may
not have an internal fan.