The easiest way is just to reflash the clean image into the box.

If you need to recover informations inside the box, you would then need to erase the password, with the JAM 5.2 you have inside scripts that can run and remove the password... but you need to have an image with JAM 5.2 built-in.

But the important would be to know "how all this happened" ?... to understand better the situation and then to be able to give you the most appropriate help.

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