I am using stabilizer board. I am trying to flash it via USB according to manual. I short BOOT, connect to microusb and then use dfu. The output of the program below:

`
.\dfu-util.exe -a 0 -s 0x08000000:leave -R -D dual-iir.bin -n 14
dfu-util 0.11

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Warning: Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release
Opening DFU capable USB device...
Device ID 0483:df11
Device DFU version 011a
Claiming USB DFU Interface...
Setting Alternate Interface #0 ...
Determining device status...
DFU state(2) = dfuIDLE, status(0) = No error condition is present
DFU mode device DFU version 011a
Device returned transfer size 1024
DfuSe interface name: "Internal Flash "
Downloading element to address = 0x08000000, size = 406248
Erase [=========================] 100% 406248 bytes
Erase done.
Download [=========================] 100% 406248 bytes
Download done.
File downloaded successfully
Submitting leave request...
Error during download get_status
`

I googled the error, it seems like it is okay since the file downloaded.
Then a shutdown the device, remove BOOT jumper and start the stabilizer. There is no response. I dont see the device using python -m serial if it connected via USB. If I insert Ethernet cable, the Ethernet LEDs dont light up on the board and on the router.
I tried to compile another version of dual-irr, the result is the same.