un-root and locking my xoom wi-fi(Bricked)

[efid845]

Hi!
I have Motorola XOOM Wi-Fi MZ604.
i am trying to un root my xoom,and lock him.
i found a guide in XDA,and done every thing that the guide said,and i think that i have bricked the device:
when i'm turning on xoom,the is a message:
" Failed image LNX 0x0002
Starting RSD mode 2."

what should i do?

some information about my xoom:
He wa with ROM tiamat 2.2.2.
I wanted to un root him,so i downloaded my stock image from moto-dev website.
i have seen on XDA tip for un-brick xoom:
Install RSD lite and download some SBF file.
how to do it?
I've downloaded every thing,but i dont have any idea how use this software.

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[ggrant3876]

Thread closed, you don't need 2 threads on the same topic.