MSI AP2021 Series Manual page 19

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 Side View
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System Power LED
1
The power LED glows when the system is turned on and goes off
when the system is shut down. In terms of power saving, the LED
blinks in S3 (Suspend to RAM) mode and goes off in S4 (Suspend to
Disk) mode.
Monitor Power LED
2
The power LED glows when the monitor is turned on and goes off
when the monitor is shut down.
Hard Disk Drive LED
3
This indicator shows the activity status of the HDD. It flashes when the
system is accessing data on the HDD and remains off when no disk
activity is detected.
System Power Button
4
Press the system power button to turn the system on or off.
Monitor Power / Mode Button
5
This button works both as the monitor power button and as the signal
input switch between PC & HDMI.
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Wind Top Series
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