iPhone will no longer connect to iTunes
Have the latest versions of iOS and iTunes. My iPhone 10 always connected to iTunes on my iMac before. Tonight when I plugged the USB wire into the iPhone, the charging tone went on and off repeatedly. The message asked if I wanted to allow the phone to connect to my iMac, and If I did respond on the phone. But no windows came up on the phone and the charging tone kept sounding on and off continuously. What is wrong?