DTK Computer Apex 386/40, User Manual

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Keyboard LEDs Do Not Light Up
After you power up your system, the Num Lock LED on your keyboard
should light up. If it does not, continue reading this section. Otherwise,
skip ahead to the next section.
Make sure the keyboard cable is connected properly to the back of
your system unit. Try substituting a keyboard which is in good working
order. If the substitute works property, you may need to replace your
keyboard. Another possibility is that your motherboard may be defec-
tive. Consult your dealer or a qualified technician.
Silent Hard Disk
Your hard disk should make a slight whirring sound if it is operating
properly. If it is not making any sound, continue reading this section.
Otherwise skip ahead to the next section.
Open your system unit and check whether the power cable between
the power supply and the hard disk is connected properly.
If the voltage appears to be acceptable, your hard disk may be
defective. Consult your computer dealer or a qualified technician.
Noisy
Hard Disk
If your hard disk appears to be making noise, check the following:
System with One Hard Disk: Remove
the
power connector
to the
hard disk and turn the system on. If the noise is gone, your hard disk
may be defective. Consult your computer dealer or a qualified tech-
nician.
System with Two Hard Disks: Remove the power connector to the
first hard disk and turn the system on. If the noise is gone, the first hard
disk may be defective. Repeat the same procedure to check the
second hard disk. If either hard disk appears to be defective, consult
your computer dealer or a qualified technician.
Chapter 5: Troubleshooting
3