18 Troubleshooting and Maintenance Guide
Error message: Invalid system
disk or Non-System disk or
disk error.
When drive activity stops, remove the disk and press the spacebar on the
keyboard. The computer should start up.
Computer does not turn off
when the On button is
pressed.
Press and hold the On button until the computer turns off.
Computer shuts down
automatically.
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.
Computer displays the wrong
date and time.
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.
For instructions, refer to the Upgrading and Servicing Guide.
Power (continued)
Symptom Possible solution
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