Chosen Solution
Iphone 6s apple logo comes on on then dissapears, continues to do this once the power button is pushed, what could it be?
At first glance, it sounds like a dead battery. You could try to replace it yourself by following this guide. You could also enhance your question by giving us more background on the device and what’s it been through. Has it been dropped or physically damaged, has it been in contact with water or not, has it been previously repaired etc. For now, I am just assuming it had a nice cushy life and died out of the blue.
