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* In case of Windows (Internet Explorer / FireFox / Google Chrome), hold down the "Control" key and "F5" key.
* In case of Macintosh (Safari / Google Chrome), hold down the "Command" key and "R" key.
* In case of Macintosh (FireFox), hold down the "Command", "Shift" and "R" keys at same time.
· The firmware upgrade is not required if its version is 4.00.