5.The problem could be caused by your keyboard. See “Keyboard Problems” later in this chapter.

6.If you want to stop whatever the computer is doing and

return to the MS-DOS command

prompt, hold down the

key and press

(or

). See Chapter 3 for more

information on stopping a command or program.

7.If your computer still does not respond, you can reset it

using the command. See “Resetting Your Computer” in Chapter 3 for more information.

8.If resetting the computer does not work, turn it off and wait at least 20 seconds. If you do not have a hard disk drive, insert your main operating system diskette in drive A; then turn on the computer. It should load the operating system.

9.If you installed a display adapter card (and did not connect it to the feature connector on the main system board), you must set jumper J3 to disable the built-in VGA adapter. Otherwise, you will not see any display on the screen. See “Changing the Jumper and DIP Switch Settings” in Chapter 4.

Restoring the Power Supply

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:

q Room temperature above 90 ° F (32°C). If this is the case, relocate the computer to a cooler area.

Troubleshooting 6-7