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Customer problem: I have a Digimaster 3 purchased in year 2018. When I update it, an upgrade notice shows “Device not found”. I had deleted some files in management before updating, I’m not sure whether it contains the DEVI file or not. How to fix it now?

Autonumen.com engineer replied:

It needs to re-flash CPU for Digimaster3.

Please download the SD card program files of Digimaster III again from the official website: http://www.autoemaster.com/en/index.asp.

There is CPU re-flash instruction in the file. After unzipped, copy the files and paste to your SD card to cover the original data.

Note: Before refresh the data, you’d better backup the original data has been read in the SD card firstly.

Hope it helps you!

https://www.autonumen.com/blog/digimaster-3-device-not-found-error-solved/