O.K., I was hanging around a while with my old Honor 8… 
Today I was again searching for an idea and I have found this thread in our forum:
there was a solution which unlocked the bootloader, now I was able to install another Firmware,
it worked for me…the security pattern is now off the phone…installed Android10 stock, and after that Ubuntu-Touch…maybe I give it a second chance…
thanks to all for their reply, now I have my older one for spare, or maybe I try to heat the power cpu, to maybe give contact underneath and use it also…will see… thanks for that…