Please what you think of all these diagnoses.


model: a1634 iphone6s+

system: ios 10.3.3 updates ios11.0.1

problem: phone turn black screen (no logo&battery&itunes)
function on ios11.0.1 after upgrade. took screenshot , posted share.
, black screen on table.... (not sure moment phone turn off or screen off.)

lock+home / dfu / recovery not working on case.

still can: charging, itunes, vibrating, incoming phone ( vibrating)

genius bar: motherboard or logic board broken
customer support: downgraded ( not working)
online posts: screen ( don't have screen changed or small scratch on it)


can what's problem exactly? totally confused right now.
 

so if understand correctly, updated phone ios11, phone worked , then, out of blue, went black screen on you? did genius give diagnostic after he/she checked phone in person or based on support call?

here's thing...apple loves lump non-screen issues "logic board failure" , charge oow replacement costs. in case, if phone original , never opened, is logic board issue. these failures can repaired experienced micro-solderers less oow cost , keep data (if didn't have backup).

happened phone in days/weeks leading failure? remember drops or impacts or contact/proximity water?
 


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