Acer Altos R920 Series, User Manual

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2 System setup 34
Note: If the system does not turn on or boot after pressing the
power button, go to the next section for the possible causes of the
boot failure.
If the POST finds any problems, the system will emit a beep code
followed by an error message displayed on the monitor. Aside from the
POST messages, you can determine if the system is in good condition
by checking if the following occurred.
• The power indicator on the control panel lights up green.
• The Num Lock, Caps Lock, and Scroll Lock indicators on the
keyboard light up.
Power-on problems
If the system does not boot after you have applied power, check the
following factors that might have caused the boot failure.
• The external power cable may be loosely connected.
Check the power cable connection from the power source to the
power cable socket on the rear panel. Make sure that the cable is
properly connected to the power source and to the power cable
socket.
• No power comes from the grounded power outlet.
Have an electrician check your power outlet.
• Loose or improperly connected internal power cables.
Check the internal cable connections. If you are not confident to
perform this step, ask a qualified technician to assist you.
Warning! Make sure all power cords are disconnected from
the electrical outlet before performing this task.
Note: If you have gone through the preceding actions and the
system still fails to boot, ask your dealer or a qualified technician
for assistance.