All running ok up till now? Good battery? Can you test the voltage from the PSU? If it has extra memory try taking it out (earth yourself first and only touch the memory by the very edges) and try switching on then.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone