Lenovo Flex 4 1470 won't power on

My Lenovo Flex 4 1470 80SA won't power on after I replaced the Ram, I've replaced Memory in laptops before in the past with no problems. I even put the old Memory back in and the Lenovo still won't power on I've tried unpluging the intenal battery and holding the power button for 30 seconds even for 2 minutes tried pushing the power button 10 times and than holding the buton i even left the internal battery unpluged for days and than tried leaving it pluged in for days nothing works can anyone please help this laptop was my daughter's Birthday gift last month I feel so bad Please help. The date code on the laptop in from July 2016 if that helps. Please help