HP A6110n - Pavilion - 2 GB RAM Troubleshooting And Maintenance Manual page 24

Power (continued)
Symptom
Computer will not turn on
or start.
(continued)
Invalid system disk or
Non-System disk or disk error
message displays.
Computer does not turn off
when the On button is
pressed.
Computer shuts down
automatically.
Computer date and time
display is incorrect.
20
Troubleshooting and Maintenance Guide
Possible solution
Incompatible memory (RAM) may have been installed. Reinstall the old
memory to return your computer to its original state. Refer to the Upgrading
and Servicing Guide for instructions.
Reseat the hard disk drive's data and power cables. See the Upgrading and
Servicing Guide for instructions.
When drive activity stops, remove the disk and press the spacebar. The
computer should start up.
Press and hold the On button until the computer turns off.
The computer may be in an exceedingly hot environment. Let it cool down.
Ensure computer air vents are not blocked and internal fan is running. Note
that your computer may not have an internal fan.
The real-time clock (RTC) battery may need to be replaced. Battery life is
approximately seven years.
Before replacing the battery, try resetting the date and time in your operating
system by using the Control Panel. If the problem persists, replace the battery.
See the Upgrading and Servicing Guide for instructions on replacing the
battery.