My DSO203 is also ‘bricked’ with a white screen, after a FW upgrade attempt.
Since it has a white screen, I’m unable to try any solution that might provide me with a Serial Number / Licence number.
As for ‘how I managed to brick it’? Well, all was working fine after the update, but I couldn’t save any files. For some reason, I had no space left on the device.
I can still put it in DFU mode and it does seem like it’s converting the files into ‘RDY’ extensions… that’s all it does.
Version is a 2.7B.
I’m not afraid to solder a serial connector on CN7; I’ve had to do that with my Buffalo router to Unbrick it. I ended-up succeeding. I just want to make sure I have the knowledgeable people behind me to assist, should it need to get to that.