Yes is similar to Thread: [Only registered and activated users can see links. ]

Here is microswitch for Preboot mode:

[Only registered and activated users can see links. ] [Only registered and activated users can see links. ]

Put in pre boot mode then
Try rewriting firmware the first time, with this firmware:

1 DNX5_6Series_280.rar
[Only registered and activated users can see links. ]

If it does not work, try with this firmware:

2 DNX5_6Series_280.rar
[Only registered and activated users can see links. ]