Power
Problem
No power
(The power
indicator is off)
Display
Problem
No display
output after
turning the
computer on
(Black screen)
7-4
Possible Cause
Incorrect power voltage
Your computer is not
turned on.
Your computer's power
cord is not properly
connected.
PSU (Power supply unit)
problems
Possible Cause
The signal cable is
not connected to the
correct VGA port on your
computer.
Signal cable problems
Action
• Set your computer's power voltage
switch to your area's power
requirements.
• Adjust the voltage settings. Ensure
that the power cord is unplugged
from the power outlet.
Press the power key on the front panel
to ensure that your computer is turned
on.
• Ensure that the power cord is
properly connected.
• Use other compatible power cord.
Try installing another PSU on your
computer.
Action
• Connect the signal cable to the
correct display port (onboard VGA or
discrete VGA port).
• If you are using a discrete VGA
card, connect the signal cable to the
discrete VGA port.
Try connecting to another monitor.
Chapter 7: Troubleshooting