Change bt keyboard type t715

[Gnudoll]

Device: sm-t715 (purchased eBay, factory refurbished)
build number NRD90M.T715XXU2CQCL
Android 7.0 installed
Keyboard device Lenovo thinkpad ebk-209a German DIN


Searched Google and XDA, no related results.

This keyboard works fine on both my previous tab (T713) and my phone (sm-g900v), but the settings for my new t715 won't let me set the keyboard type, which renders the keyboard useless. The default is US english, and this is different from the bluetooth keyboard in several respects. Is there some back way in, or do I need to get a different ROM for it? If the latter, where would I find it (or do one of you have one)?

Additional data availabe on request.

 

[Gnudoll]

Device: sm-t715 (purchased eBay, factory refurbished)
build number NRD90M.T715XXU2CQCL
Android 7.0 installed
Keyboard device Lenovo thinkpad ebk-209a German DIN


Searched Google and XDA, no related results.

This keyboard works fine on both my previous tab (T713) and my phone (sm-g900v), but the settings for my new t715 won't let me set the keyboard type, which renders the keyboard useless. The default is US english, and this is different from the bluetooth keyboard in several respects. Is there some back way in, or do I need to get a different ROM for it? If the latter, where would I find it (or do one of you have one)?

Additional data availabe on request.

Bump

 

[Gnudoll]

[SOLVED!?!]

I did nothing, but it is working now (at least the keyboard type is correct for the keyboard). I do not know which is worse: The inital problem? or it seeming to fix itself, with nothing done by me? It is not a solution, but it is working. . .