Can not restore iPhone 6S due to error 53

I was getting stuck at the Apple Logo loading bar when tried to update the iOS 9 on my iPhone 6S. I therefore attempted to restore my iPhone, but it can not be restored due to an unkown error occured (53).
I have tried on different computers and used some other USB cable, but the problem remains the same. Need someone’s experiences.

Hi @possummagic!
I am so sorry to say this error is supposed to be a hardware problem. You need to bring your iPhone to nearest Apple Store service for further assistance.