Amazon Kindle Touch: MobiNAND test fails.

Hello. Once my Kindle booted in diagnostics mode. It performed "movinand" test and then reported that it failed. What does that mean?

I tried to restore it using Kubrick Live CD. Starting steps are successful, but on "turn on USBnet" nothing happens, though I carefully follow the instruction pressing all mentioned items on the e-book. So it's impossible to proceed.

Any suggestions?