@kerryzhou Thank you.
This is what worked for me. I used a single cable USB connected to J20 plus external power J43. J11 was not connected.
1) Power-off EVK, disconnect all USB cables
2) Set SW1 to serial mode: SW1: 1-OFF, 2-OFF, 3-OFF, 4-ON
3) Connect single USB cable from PC host to J20 USB1 (SDB)
4) With power cable J43 connected, switch on power SW5.
4) Launch NXP MCU Boot Utility, bin\NXP-MCUBootUtility.exe
5) Press button “Connect to ROM” on left
6) After “Connect to ROM”, verify USB-HID displays Vendor ID: 0x15A2, Product ID: 0x0073
7) Under Target Setup, select MCU Series and Device: i.MXRT1117x
Select tab Boot Device Memory
9) Change Start/Offset: 0x30000000 ( 8-digits) , Change Byte length 0x1000 (4-digits).
While not required, setting helps you erase flash memory, especially the FCB, IVT,BD area, which influence the boot, and debugger connection.
10) Press button Mass Erase
11) Restore SW1 to internal boot mode: SW1: 1-OFF, 2-OFF, 3-ON, 4-OFF, and reboot EVK board
I can debug again normally using MCUXpresso,
Thank you for your patience and assistance!
-Ed