Hello.DSO2D15
I installed the firmware dso3kb_20210510 Firmware: 3200.
there was a firmware dso3kb_20201118
Firmware: 3000.
how to get back Firmware: 3000?
You have to use platform tools. Check my google drive folder.
Some will change your FW to 3101 or 3102, but they all work ok if you had FW3000.
The only fw making trouble is 20210510, that changes it to FW3200 and breaks calibration.
Mine was 3000, I installed 20210517(FW3102) and it works a lot better than the old versions.
If you have any issues, you can flash 20201221(FW3000) that will completely restore it.
Serial, model and HW will be undefined after flashing platform tools, but it doesn't seem to matter.
If you want restore them, copy the script
do_other_update(Edit Model-Serial-Hardware) to the root of the usb drive.
Rename it to
do_other_update. Edit and change the model and serial number.
Then you can update throught the system menu to the latest compatible version (actually 20210416).
If "do_other_update" is present, the system will run it automatically.
where did you find 20210517?
Someone sent be a PM with that fw. It's not an update, but a full fw, it's in platform tools.