Acer Aspire E1-521 Acer Aspire E1-521 Notebook Service Guide - Page 38

System LED Indicator Item Lock System state HDD access state Wireless state Power button backlight Battery state Specification 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 System DMA Specification Hardware DMA System Function DMA0 Not applicable DMA1 Not applicable DMA2 Not applicable DMA3 Not applicable DMA4 Direct memory access controller DMA5 Not assigned DMA6 Not assigned DMA7 Not assigned NOTE: Express Card controller can use DMA 1, 2, or 5. 1-31 Hardware Specifications and Configurations