Chosen Solution

my iphone shut down after connect to computer speakers and not turning oni Connect to 3Utool Showing Exit to DFU Mode I Normally apply power button and home button but not outing DFU Mode idont’t know it’s software problems or hardware

I suspect that connecting the external speakers caused some damage to the Lightning Port or logic board. If the IC (Tristar) that is responsible for communicating with external peripherals is damaged, then the phone won’t boot properly. You could try to replace the Lightning port yourself to see if that solves the problem but realistically, this is probably Tristar related and this requires a micro-soldering repair and is not DIY.