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a. Please remove the battery (for removable battery models) and check if the ac adapter plug is
loose (marked in the below image: A-power cord plug, B- outlet side plug, C- NB side plug) or try
plugging into different outlets.
b. Please check for any damage on the ac adapter cable. If any damage is found, try another
ac adapter.
c. Please press and hole the Power button for 15 seconds, then re-install the battery (for removable
battery models) or connect the ac adapter (for non-removable battery models) and try to restart
your device.