I am trying to use TTM (nRF Thread Topology Monitor package) with a newly bought nRF52840 Dongle (PCA10059) on Windows.
Following the instruction at https://docs.nordicsemi.com/bundle/ug_nrf_ttm/page/UG/nrf_ttm/ttm_adding_topology.html, I flashed the hex (nrf52840_xxaa_mbr_pca10059_usb.hex) inside the TTM package (nrfttmwin32x640130.zip) with Programmer, flashing process was successfully done with no any warning message, but there was no COM port appeared in TTM.
I noticed that the led on the dongle was not lit, so I unpluged and pluged in the dongle but it didn't help, and there was no any new USB device detected in device manager after I plugin the dongle.
I'm able to flash back another hex for nRF Sniffer for 802.15.4 Desktop tool and get the exact same dongle working to sniff thread packet with wireshark. so I'm guessing this is not an hardware issue?