4.5.- LED INDICATORS
The Computer SMART III device comprises:
  A CPU LED: Indicates that the device is working properly by flashing once per second. 
  An Alarm LED: Indicates that an alarm is activated.
 A Fan LED: Indicates that the fan is operating.
  A Key pressed LED: Lights up when any of the five keys are pressed.
CPU
Fan
Alarm
Key pressed 
Figure 18:LED indicators of the Computer SMART III.
 
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Instruction Manual
Computer SMART III