Have to remove and replace battery to boot

Hi,

I have a dell inspiron 15 7537. A couple of times recently it would not boot and no light came on when the power was plugged in. The first time I took it apart and then it worked and so I started adding things back in and it kept working. When it happened again I only removed and replaced the battery and then it worked. Any ideas why this might be happening?

Thanks in advance.

Tom