My PS4 Pro Model CUH-7015b died

I typically use the Pro to watch Youtube while going to sleep. I woke up to find the PS4 turned off. I tried to turn it back on. It starts… a blue light blinks for a sec… then it turns off. It wont turn back on unless I completely UNPLUG it and plug it back in (I know but its true.) Any suggestions what the problem could be? If needed, can it be sent in and would it cost alot for repair?