First of all, back up all the files you wish not to lose (do it using your computer or a SD card). Backing up applications on LINKSYS EA7400v1 is not advisable as they might be the reason your device is malfunctioning. After the hard reset, install them one by one monitoring the reactions of your LINKSYS EA7400v1.
After having saved all personal data, delete them in order to prevent the accidental formatting while performing the hard reset operation.
24 Jan 2022
02 Feb 2022