When I turn on my laptop the screen is black for most of the times . but sometimes its getting turned on normally . i am not able to understand the exact problem . after going to some similar posts on this site i have tried the way of removing the battery and pressing the power button for 2 min and turning it on back but this could solve my problem only for the first time but not always . right now , my laptop is blank . i am pretty sure that the screen is not broken. please suggest me what to do?