Learning Board, Issue when I Revive a USB Audio EVM


When I use Learning Board(PP-SALB),  the USB-Lock LED Light did not illuminate when I power on the device (USB only).

The device enumerated as a "DFUUSB" device in the Device Manager.

Then I try to revive it as this link and use sloc305 : https://e2e.ti.com/support/data_converters/audio_converters/w/design_notes/2790.how-to-revive-a-usb-audio-evm

I follow it successful step by step until step 13. After I click "open", the DFUtest software is not responding as shown.


Thanks for anything you can provide.