I had this same problem with my BLU Studio XL 2 phone. I solved it by removing my battery, waiting 10-30 seconds, and then putting it back and turning my phone on. First, remove the back panel/ cover of the phone. Since my phone had a built in battery, I needed a 000 Philips screwdriver, which I found at Radioshack as part of a kit. The same kit I used can be found on Amazon: https://www.amazon.com/iFixit-IF145-348-2-Essential-Electronics-Toolkit/dp/B01MRNIFR6/ref=sr_1_5?s=power-hand-tools&ie=UTF8&qid=1529366978&sr=1-5&keywords=ifixit After removing the screws, I used one of the little blue plastic triangles to remove the mid-frame of my phone. I removed the battery, waited about 30 seconds, then put it back in my phone, along with the midframe, the screws, and back panel. I pressed the power button, and my phone turned on!! It worked normally. '''My suggestion to prevent this happening in the future is to not shut down the phone while charging. '''