My Lenovo Ideapad Yoga 11 is not woking.it is a built in battery, so i cant remove it. i had kept it for about 8-9 months without use or charging.many months and days later, i tried to turn it on but no reponse. the led isnt blinking , the screen isnt showing anything . it is like doa- dead or alive. any solutions??? please as soon as possible contact me.