•
For further diagnostics, connect the OLED board to the CPU
board.
o
On the CPU board disconnected from the USB cable, use
tweezers or a reliable short-wire jumper to short-circuit the
two VIA-contacts located next to the battery.
o
While keeping the contacts short-circuited, connect the CPU
board via a USB cable to your PC with the installed Swift CPS.
When connected via USB, the CPU board with the short-
circuited contacts will be detected by the Device Manager and
by Swift CPS as "STM32 Bootloader" or "STM Device in DFU
Mode" (depending on the OS version).