Thank you for your answer.
I was hoping I could get into diags mode without a serial connection. I understood from some post here that "SE Blank MEGREZ" indicates that my KV is in "USB downloader mode". In this mode I wanted to flash something to get into diags mode. (At least thats how I unterstood some post about "KindleSelectBoot" or "MfgTool.exe")
I don't know if the diags mode would be useable at all without a serial connection.
So I will just wait until I get the USB->TTL stick.
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