iphone wont turn on
why wont my iphone 7plus turn on, tried holding power button and bottom volume button
iPhone 7 Plus
It's difficult to give you a proper answer, since we can't diagnose that issue remotely.
See this support guide:--> If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
If you get no help, have your device inspected at an Apple Store or AASP:--> Apple – Location Selector
Regards
Giulio