Thanks for the tip @OtaDr , but it looks like I have a corrupted FASTBOOT (black screen).

Hi,
I'm looking for a way to flash a standard Android. Can anyone offer any advice?
I tried using chatagpt, but it didn't work. After trying dozens of combinations, chatgpt says I need to disassemble the phone and short the contacts to perform the EDL process, or take the phone to a manufacturer's service center.

Best regards,
Erwin