When these circuits detect a high temperature, they shut off all the DC outputs in the power supply and your computer stops operating. This does not damage the power supply, but you must remove the cause of the high temperature before you can use your system again,

To restore normal power supply operation, follow these steps:

1.Turn off the computer and leave it off for at least 30 seconds to reset the power supply logic.

2.To determine the cause of the high temperature and correct the condition, check for the following:

Cl A blocked power supply fan. Make sure that nothing blocks the power supply fan vents in the back of the computer case. Check both inside and outside the computer for blockage. Make sure there is ample room around your system for air circulation.

Cl Room temperatures of 95° F (35° C) or above. If this is the case, move the computer to a cooler area.

tl An overload of the power supply limitations. Check the table on page D-4 to see if you have exceeded the option slot power limits. See your option card manual for the power requirements of your card(s).

3.After you eliminate the problem causing the overheating, allow the computer to cool down for at least five minutes at a room temperature of about 78° F (25” C). This resets the thermal detection circuits.

4.If you removed the computer’s cover, replace it now. Then turn on the computer.

If the power supply shuts off again after you follow the steps above to correct the problem, contact your dealer.

C-8 Troubleshooting