Computer appears locked up and will not turn off when the power button is pressed.

Cause

Solution

Software control of the power switch is not functional.

1.Press and hold the power button for at least five seconds until the computer turns off.

2.Disconnect the power cord from the electrical outlet.

Computer shuts down automatically.

Cause

 

Solution

 

 

 

Thermal protection has been activated.

1.

The computer might be in an exceedingly hot

 

 

environment. Let it cool down.

 

2.

Clean the air vents on the front, back, or any other

 

 

vented side of the computer.

 

3.

Ensure that there is a 10.2 cm (4 in) clearance on all

 

 

vented sides of the computer to permit the required

 

 

airflow.

 

4.

Ensure that computers are not stacked on top of each

 

 

other or so near each other that they are subject to each

 

 

other's re-circulated or preheated air.

 

5.

If the computer is within an enclosure, ensure that there is

 

 

proper intake and exhaust ventilation for the enclosure.

 

6.

If a message appears on the screen indicating that a fan

 

 

is not working, replace the fan.

 

 

 

Computer will not respond to USB keyboard or mouse.

 

 

 

 

 

Cause

 

Solution

 

 

Computer is in standby mode.

To resume from standby mode, press the power button or

 

press any key.

 

CAUTION: When attempting to resume from standby

 

mode, 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.

 

 

 

Computer date and time display is incorrect.

 

 

 

 

 

Cause

 

Solution

 

 

RTC (real-time clock) battery may need to be replaced.

First, reset the date and time under Control Panel

NOTE: Connecting the computer to a live AC outlet

(Computer Setup can also be used to update the RTC date

prolongs the life of the RTC battery.

and time). If the problem persists, replace the RTC battery.

 

 

 

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HP 600B manual Computer shuts down automatically Cause Solution, Computer date and time display is incorrect Cause Solution

600B specifications

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