Sony VAIO Laptop - on, running, but nothing after that

Tammie3

Estimable
Jul 19, 2015
2
0
4,510
My Sony Laptop, Model SVF15212CZECH, is on. The green power light indicates this. I hear it running, but I do not have anything but a black screen. Less than 2 mos. ago I sent it in for repair; I got it back with a new motherboard. Do you have any suggestions as to what I may do to prevent having to send it in again? I apappreciate your help!