Acer Aspire E1-521 Service Manual page 38

System LED Indicator
Item
Lock
System state
HDD access state
Wireless state
Power button backlight
Battery state
System DMA Specification
Hardware DMA
DMA0
DMA1
DMA2
DMA3
DMA4
DMA5
DMA6
DMA7
NOTE:
Express Card controller can use DMA 1, 2, or 5.
1-31
N/A
• Blue color solid on: System on
• Blue color and amber color off: System off
• Amber color blinking: S3 state
Reflects the activities of the HDD or Card reader access
Amber color if a wireless device is active
• Blue color solid on: System on
• Blue color off: System off
Charging
• Amber solid on - Battery charging with AC
• Blue color solid on - Battery full
• Amber color blinking - Battery abnormal stop charging or
battery in low power state
Discharging
• Amber color blinking - Battery in critical low state
• Blue and Amber color off - Discharging state
Not applicable
Not applicable
Not applicable
Not applicable
Direct memory access controller
Not assigned
Not assigned
Not assigned
Specification
System Function
Hardware Specifications and Configurations