Page 1 of HELP UNHACKABLE SAMSUNG N505 MACHINE!!!

Just been saddled with an N505 machine in exchange for my dead 709.
PROBLEM: I have shed loads of region 1 discs and a machine I can not hack.
I have tried loads of codes for other models and the popular 5, 7, 5, 3, 8 and 3, 8, 7, 6, 7 codes, neither of which work.

Both of these sets of numbers appear as you type them in in the top left hand corner but then NO DISC appears and no other number input (for the region) is allowed.

Does anyone know of a hack or somewhere else I can try?

PLEASE HELP

Thanks

Steve