DSO203 - brick, white screen

DSO333

Hello,

My Mini DSO stopped working. It only shows a white, blank screen when turned on.
DFU mode does not work either.

So I went along with the instructions found here: https://minidso.com/forum.php?mo ... p;extra=&page=1
I bought a USB to RS232 adapter,
soldered a connector onto the DSO board as described,
installed 'stm32flash' (Linux Debian),
checked and switched RX/TX around if there is no connection (as suggested in the instructions),
downloaded the .hex file to upload onto the DSO.

Yet there is no connection. as one can see from the output of stm32flash there seems to be a problem with initialising "the device" (the adapter or the DSO?).

Now the USB to Serial adapter does show under '/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0' which disappears when I pull it out, so the adapter is recognised by the computer.
The output of the device information request from stm32flash is as shown below.

Does anyone have any hints to what to do next or where the failure might be?

------
stm32flash /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0
stm32flash 0.5
http://stm32flash.sourceforge.net/

Error probing interface "serial_posix"
Cannot handle device "/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0"
Failed to open port: /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0
------
sudo stm32flash /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0
stm32flash 0.5
http://stm32flash.sourceforge.net/

Interface serial_posix: 57600 8E1
Failed to init device.
------
stm32flash /dev/serial/ttyUSB0
stm32flash 0.5
http://stm32flash.sourceforge.net/

Error probing interface "serial_posix"
Cannot handle device "/dev/serial/ttyUSB0"
Failed to open port: /dev/serial/ttyUSB0
------
sudo stm32flash /dev/serial/ttyUSB0
stm32flash 0.5
http://stm32flash.sourceforge.net/

Error probing interface "serial_posix"
Cannot handle device "/dev/serial/ttyUSB0"
Failed to open port: /dev/serial/ttyUSB0

sand_zhu

Thanks for your feedback. There may be a hardware failure in the DSO. When we didn't get this DSO, it was difficult for us to know the real state. If necessary, please contact us to provide after-sales maintenance services. Service email ： dso-service@hotmail.com