Solving General Problems - HP Pro 3400 Maintenance And Service Manual

Solving General Problems

You may be able to easily resolve the general problems described in this section. If a problem
persists and you are unable to resolve it yourself or if you feel uncomfortable about performing the
operation, contact an authorized dealer or reseller.
WARNING!
the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
sure to disconnect the power cord from the wall outlet and allow the internal system components to
cool before touching.
Table D-1 Solving General Problems
Computer appears locked up and will not turn off when the power button is pressed.
Cause
Software control of the power switch is not functional.
Computer will not respond to keyboard or mouse.
Cause
Computer is in Sleep state.
System has locked up.
Computer date and time display is incorrect.
Cause
RTC (real-time clock) battery may need to be replaced.
NOTE: Connecting the computer to a live AC outlet
prolongs the life of the RTC battery.
When the computer is plugged into an AC power source, voltage is always applied to
Solution
1. Press and hold the power button for at least four
seconds until the computer turns off.
2. Disconnect the power cord from the electrical outlet.
Solution
To resume from Sleep state, press the power button.
CAUTION: When attempting to resume from Sleep state,
do not hold down the power button for more than four
seconds. Otherwise, the computer will shut down and you
will lose any unsaved data.
Restart computer.
Solution
Reset the date and time under Control Panel (Computer
Setup can also be used to update the RTC date and time). If
the problem persists, replace the RTC battery. See the
Removal and Replacement section for instructions on
installing a new battery, or contact an authorized dealer or
reseller for RTC battery replacement.
To access Control Panel in Windows 7, select Start, and
then select Control Panel.
To access Control Panel in Windows 8, from the Start
screen, type c, and then select Control Panel from the list of
applications.
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