iPhone 8 plus won't turn on
I recently got my iPhone 8 Plus second hand. I was playing music on it when the music randomly stopped. The screen had gone black and wouldn't turn back on. I charged it, even though I knew it wasn't flat since it had been on approximately 40%. I did some research and tried a hard reset and a reset connected to my laptop. It still hasn't turned on. Does anyone know why this happened and if it is fixable??
iPhone 8 Plus