Still waiting for your answer ??
Ok set the key to position to S-Mode (6 o-clock position), the screen should then ask you for a password ***** either 0000 or 9999.I only have the ser-7000i engineer\maintenance manual, however this should work in the 7000 model too.Details for setting \ programming the till can be found here: http://www.salopcashregisters.co.uk/pdf's/SER7000Program.pdf
This hasn't worked, there is still nothin on the user display ??
It sounds like the display or main board is faulty, as it should load a menu.There isnt any lock or password ***** stop the display showing up.If your not getting anything displayed it sounds like the unit is faulty I am afraid.