Compaq 315eu Maintenance and Service Guide - Compaq 100eu Small Form Factor, 1 - Page 161

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. Ensure that the CPU fan is plugged in. 7. Ensure that the CPU was not replaced with an unsupported CPU Computer will not respond to USB keyboard or mouse. Cause Computer is in Hibernate mode. Solution To resume from Hibernate mode, press the power button or press any key. CAUTION: When attempting to resume from Hibernate 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. Solving General Problems 151