Chosen Solution

I just switch off my iphone 6 plus this afternoon after 5 min trying to switch it on screen still black tried to rest with no showing anything

Try the most obvious first: 1/ Try rebooting your phonepress and hold Home Button + Power Button together for like 15 seconds or until you see the Apple <=> the phone restarting. 2/ Charge it for 30 minutes to make sure it is holding a charge (does it show anything on the screen?) using a known good charger and cable. Then try step 1. Does this help?