Macbook won’t start, black screen, startup sound comes on but the power/sleep light goes off
I was starting my MacBook and the screen stays black and I could hear the start up sound but the indicator/sleep light goes off as soon as the start up sound comes on. It was working fine a few hours before that happened. When I close the screen lid down the power/sleep light comes on and stays solid. I tried to reset SMC and PRAM but it didn’t help. I also force power off by pressing the power button but still the same thing. Power light and sound comes on when turned on then off with in a second but I could hear the computer fan going both with the lid open or closed. Please hint me if you have any idea what it could be. Thank you
The laptop is mid 2012 non-ritena MacBook Pro