2  Troubleshooting Procedures   2.3  Power Supply Troubleshooting 
2-8  Satellite A80 / TECRA  A3/S2  Series Maintenance Manual 
The power supply controls many functions and components.  To determine if the power supply is 
functioning properly, start with Procedure 1 and continue with the other Procedures as instructed. 
The flowchart in Figure 2-2 gives a summary of the process.  The procedures described in this 
section are: 
Procedure 1:  Power status check 
Procedure 2:  Adaptor / battery replacement 
Procedure 3:  Power supply connection check 
Procedure 4:  Diagnostic check 
Procedure 5:  Internal connection check 
 
Procedure 1  Power Status Check 
The following LEDs indicate the power supply status: 
Battery LED 
DC-IN LED 
The power supply controller displays the power supply status through the Battery and the DC-IN 
LEDs as listed in the tables below. 
Table 2-1  Battery LED 
Battery State  LED colors  Definition 
Amber, solid on   Battery charging with AC . 
Green, solid on  Battery fully charged by AC 
Charging 
Green color off  Battery abnormal stop charging with AC 
(Bad cell/ Overheated) 
Amber, blinking 
every 4 seconds) 
Battery within low state: 12 minutes 
remaining 
Amber, blinking 
every 2 seconds) 
Battery within critical low state: 3 
minutes remaining. The system is 
protected and cannot be re-powered on 
without the AC power connected.  
Discharging 
Amber color off  Battery not in low or critical low state; 
It’s in discharging state