Thank you so much for your response. I tested my issue on two kindles. On my Kindle Voyage, I navigated to the thumbnail folder and replaced a jpg file. Then the thumbnail picture showed up. I did the same thing on my KPW4. It didn't work. I used Calibre changed the file ASIN. Then reconverted the file to MOBI. It did not work either. Another thing I found out was, only Calibre 4.17 and later works with connect-disconnect-reconnect fix. My PC has Window 7 which Calibre only supports to 3.48.
Quote:
Originally Posted by shamanNS
Read this thread:
https://www.mobileread.com/forums/sh...d.php?t=329945
Basically after the thumbnails for newly transfered book have disappeared just re-connect your Kindle to your computer while Calibre is already opened and Calibre will re-copy thumbnail images.
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