it's locked at the part where it's trying to pump the hard disk.

I've had pumping problems a few times when upgrading software.
In all of these cases the process got stuck with the 'repump partition' message when changing the player's software without resetting the player, when asked for (just letting it run). Abiding by the instructions / restarting the player when instructed allowed the pumping to progress as intended.

The Mk2 or the latest software seem more critical than when I still had the Mk1 . . .

Good luck

Henno
mk2 6 nr 6