my macbook wakes up and then goes back to standy even when the lid is open.

so my macbook turns on and then the screen stays on for like 2 seconds then goes back to standby. it does not shut down because when i wake it up again by pressning any button, it is where i was before. Also when it is in standy even when the lid is on, the standby light blinks as if the lid is closed. i can never use it because the screen only stays on for 2 seconds then turns off going to stand by. does anyone have a similar problem or know how to fix this?

thanks in advance!