Acer ASPIRE E1-521 Service Manual page 73

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Press and hold <Fn> and <Esc>, and then plug the AC adapter. Continue pressing <Fn> and
3.
<Esc>.
As <Fn> and <Esc> keys are pressed, press the Power button to turn on the target machine.
4.
Wait for 3~5 seconds to make sure the system fan is on full speed before releasing <Fn> and
<Esc> keys.
Wait for 3~5 minutes for the system to complete the crisis operation.
5.
NOTE:
If the waiting time takes more than 5 minutes, the system recovery might have failed. Please
check the following:
System Utilities
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Figure 2:53. Hold Down <Fn> + <Esc> and Plug AC Adapter
Figure 2:54. Press the Power Button
BIOS filename (i.e. BIOS.fd) is correct on the USB flash disk.
Pull out the AC adapter and remove the battery to reset the embedded controller status
Repeat steps 1~5.
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Plug in!
Power On!
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