iphone won't connect to Windows 10 PC, I found the problem.

iphone 15 pro, windows 10 pc, won't connect at all. Plugged phone into the USB port on the computer, it started charging, so fielt the cable to be ok. But wouldn't do any more than charge.

Tried connecting the cable to another PC, windows 8, no problem.

Found that my setup had too many daisy-chained USB multi-port adapters, and the last one didn't work right, probably just weak signal due to the daisy-chaining without any voltage boost, it just ran out of gas. Bypassed it, used a port closer to the PC in the chain, and now iphone connects fine.