u/Emergency-Bit-6312

I’ve had this issue for a while now but haven’t taken it to an electronics shop to fix it yet cause I want to know exactly what the problem is. The battery is a little puffy and it is taking full charge, I did manage to turn it on just the other day but after I closed it without powering it off the screen froze then I had to power it off fully. Now it won’t turn on again. What might be going on?