Compaq 100B Maintenance and Service Guide - Page 61

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

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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 Thermal protection has been activated. Solution 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 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. Solution First, 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. 53

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53
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.
Computer shuts down automatically.
Cause
Solution
Thermal protection has been activated.
Computer will not respond to USB keyboard or mouse.
Cause
Solution
Computer is in
standby
mode.
Computer date and time display is incorrect.
Cause
Solution
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.
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.
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.
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.
First, 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.