The Summit 450 W power supplies (AC and DC) have the status LEDs listed in the following table.
| Position | Color and State | Meaning | 
|---|---|---|
| 
                                 Top  | 
                            
                                 Steady Green  | 
                            
                                 +3.3VSB ok; 12 V ok; power supply is working properly.  | 
                        
| 
                                 Middle  | 
                            
                                 Steady Amber  | 
                            
                                 Fault condition (for example, 3.3VSB OCP/UCP, 12V OCP/UCP, or fan failure).  | 
                        
| 
                                 Bottom  | 
                            
                                 Steady Green  | 
                            
                                 Power supply is connected to power. If the cord is connected and this LED is off, the power supply is defective.  |