Hi sorry I didn't see your response, only now.
Now today, something happened to the 3rd kcu116 board
Now jtag not recognized by vivado and the USB device not seen appearing on windows device manager, when input us to J2, probobly U21 not gets somehow any data from us lines.
When I plug USB to j164 which is USB to UART that communicate with U166 which is cp2105 chip, windows recognize it, but I don't see communication via boardUI software that is related to config the kcu116 evb.
I saw some garbage on the UART terminal but reading the version or other features was in successful via the boardUI.
I was connected to the kcu evb via FMC connector to my board which got some touching of metal small connector and than suddenly the jtag on vivado disconnected and I could fix it any more, I just don't understand what could happen, some touch on other than kcu116 board that connected via FMC, could somehow damage to both USBs USB to UART and USB to jtag (your controller smp2 NC) what could happen and on the USB there is a tvs protection.
Would be glad for your help.