Blank screen, Itunes sees it, what next?

phone 6s that died, suddenly froze and screen went blank, no audio, no vibration. No issues with touch before this happened. Thought it was dead, mainly because it no longer makes any noise and when you flip the silence switch it doesn't vibrate. Should be talking or responding to home button because voice over is on.

When Plug it into the PC, Itunes recognizes it and ask for user input on the phone, Phone has no display, makes no sound doesn't seem to respond to any touch. When I press the home and power, it disconnects, seemingly restarts and then reconnects and itunes comes back up. asking for user input on . Also, it is drawing around 910 milliamps when plugged into the charger w/ usb power meter. I attempted to shine light and look carefully, it's definitely not backlight. Only thing tried is pulling screen to look reseat connectors, and look best I could for anything obvious. While I won't be able to resolder components lacking tools and skill and probably send it in for repair eventually, Would love to possibly be able to diagnose it. Any tips on what to look at next?

Hello, Could bad screen prevent the other stuff like no audio and no vibration?