The first thing to check is to see if the laptop is getting any power. NB: A lot of users have also added helpful suggestions on the comments section Power supply and charger
Today I will share a couple of things I learned you can do if your Dell laptop won’t turn on before taking it to the repair: Tried a couple of tricks I knew and eventual had a chat with Dell customer service who were very helpful. I connected the laptop to the charger but still the computer showed no signs of life. Thinking maybe the battery had been completely drained. I had been too lazy to charge it so I left it like that. I had watched a movie the previous night until the computer had hibernated when the battery was low.