Nav4 problems with recovery

Greetings to everyone! I experimented with the conversion of the TT 52 navigation until it probably turned into a door support! I'll summarize briefly: I tried with several sd cards, until I managed to install the patch with one of them, but it didn't install due to some error. I stopped, uninstalled and it said, patch removal o.k. After that, I downloaded a 21.100.0001.411 ttpkg navcore and wanted to install it with TTServiceUpdateTool, but the device did not restart. Only the TT logo, the word drum and then the circle rotates in the black display. Then the black field computer and the daily red triangle will appear! The MDC recognizes it and wants to update it, but it always starts again, because the navi only reaches the TT logo, then it starts from the beginning/ drum, circle, PC icon/! TTServiceUpdateTool also only reaches 8% with another ttpkg installation because it stops after that! Maybe something else can be done with it, or should I throw it in the trash? I appreciate the help if anyone knows!!

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Hi! So there is no possibility to bring the 52 back "to the world of the living"? I sadly accept...