Acer Altos R720 Series - Manual (Page 40)

2 System setup 30
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:
• Power indicator on the front panel lights up (green)
• 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 cord may be loosely connected.
Check the power cord connection from the power source to the
power supply module AC input connector on the rear panel. Make
sure that the power cord is properly connected to the power
source and to the AC input connector.
• 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.
• The ARMC/3 module is not installed in the server, or not properly
seated.
Check the ARMC/3 module connection. Make sure the ARMC/3
module is properly connected to the mainboard. For more
information on how to install the ARMC/3 module, see “To install
an ARMC/3 module” section on page 85.
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.