RN104 Cant Access Admin Page 07-24-2015

Are you actually seeing the "device offline" message in the browser?  Or just failing to connect?

If you are running 6.2.2, and uninstalled an app, then you will lose access to the admin page.  That is a bug in 6.2.2.

If you have run into the 6.2.2 bug, then Netgear support should fix this w/o charge (though you might need to convince them).  If they don't, you can escalate.

A work-around which will work is possible, but requires a scratch disk.

• remove all existing drives, labeling them by slot
• insert the scratch disk, and do the normal factory install.
• upgrade the system to run either 6.2.4 or 6.2.5 beta
• shutdown the system, remove the scratch disk, and reinsert the original disks.
• then power up.

The NAS should upgrade the existing disks to use the new OS, and that will restore the UI.

Note there are other possible causes to your problem - this work-around is specific to the app uninstall bug, and likely won't fix other issues with similar symptoms.