iPhone stuck on black screen with a picture of Charging cable and a macbook

Hello there community,

My iPhone was continuously connecting and disconnecting from my macbook when I connected it via USB to restore it. Then I saw a thread on this community which advised to force quit the 'usbd' from activity monitor. i did the same and voila! my phone was connected. Now as I was successful in connecting, I wanted to restore my iPhone for which I updated the software (iOS) and then went in iPhone and started restore iPhone process.

Now after my device was shutdown and syncing process was showing on mac, a sudden prompt came writing that there is 'error 9'

Let me tell you, I have tried all possible ways. 2 new original Apple USB lightning cable, two market-USB lighting cable. but it's not solving. Please suggest a way as soon as possible, I am sitting online for replies.

Thanks and regards

Pratyush