So I have been using this laptop(lenovo IdeaPad 700) for 4 years now for past few months I have been facing a problem where the display won't work at times, like I have to force shut down the pc and start it again. sometimes I have to repeat this process 6-7 times to get the display working. It works with an hdmi and screen is perfectly fine with no damage at all. Is it the display cable I have given this laptop to a shop where the technician couldn't find the problem. Please help