[axu2]

The blank page might be caused by you being on an older firmware. You can try a usb firmware update. That might fix wifi issue.

Or it might be caused by kcc settings, send a screenshot.

Did you try directly copying the mobi to the documents folder without using calibre?

Or use the kindle keyboards cbz viewer instead. I think the process is described on the mangle project. You just put the kcc optimized cbz in the pictures folder at the kindle root. Then press the secret keyboard combo to activate cbz reader.