Akai S1000 / S1100 samplers

Well I need some advcie wiht my DIY project here 
 I bought a new backlight and a new inverter as i thought my inverter was shot as well. I am following the youtube vid fome Karel 
I am using the same parts as he does .Conrad  elektronics .
As it now transpires Iam not sure anymore IF my inverter was broke in the 1st place  because the new inverter i bought takes the 5v in from the akai mainboard but as the stock one Nothing comes out ? I meassured everything with my multimeter but the out on the inverter new or old read 0


Anyone ? Any help would be greatly appreciated ..I need some backlight :)

Thanks