Acer R720 Series Manuel D’Utilisation

 1 System tour

14

Rear panel LED indicators

The illustration below shows the LED indicators located on the rear 
panel.  

A

Hot-swap 
power 
supply 
module 
status 
indicator

No power

Off

No AC power to the 
power supply. 

AC OK 
indicator

Green, on

System has power applied 
to it. 

Green, 
blinking

AC power cord is plugged 
into an active AC power 
source. 

Fault 
indicator

Amber

• No AC power.

• Power supply critical 

event (i.e, failure, fuse 
blown, fan failed, etc.) 
causing shutdown 

Amber, 
blinking

Power supply displays 
warning event (i.e., high 
temperature, high power, 
high current, slow fan, 
etc.)

B

Diagnostic 
POST code 
indicators*

Trouble-
shooting 
system

Green/Red/
Amber, on

Assists in troubleshooting 
a system hang during 
POST process. 

Identifies the last POST 
process to be executed.