What hardware fix would resolve no usb connection from an iPhone that won’t boot?
You should try to replace the battery possibly. Otherwise take it to the official Apple Store &amp; ask them what to do. If you want to do every possible solution non-money wise. Clean out the power port, Use an official iPhone charger to charge it &amp; try a hard reset/restart. If none of those work yeah take it to an Apple store and they can take a look at it and tell you what to do and whats wrong.