I've moved your post to the appropriate thread.
Another victim of GarminExpress perhaps. If you can boot to the logo, you can reach [Only registered and activated users can see links. ], or just hold the screen upper LH corner and plug in the usb. If you can reach pre-boot you can almost certainly cure it if the update caused the problem. All the help you need is in this thread so post here further but only if you need to after you grasp the basics.
PS: Sorry for the slow reply, i think we all missed your post elsewhere.
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