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can y use the sade mode(F8)?
can y use the save mode((F8) to open?
Sometime you hit the static may effect the monitor, you can try this method before go repair :Take  off battery,unplug electric wire,press the power button from 30 to 60 sec. after that you resert the battery and electric to reboot, if not,try the Fn+key to clean the monitor, if still no good ,your notebook take to someone to repair. Good Luck!
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