Originally Posted by awh_tokyo
No dice :-( Flashed the 5.3.0 image with fastboot, and it boots, but it must rely on the JB already having been installed. Tried to downgrade to 5.2.0 but the system partition seems to be a damaged ext3 filesystem.
Loop mount the file system image and fsck it before using it.
Tell us what fsck reports.
Also, what 5.2.0 image you are using.