Vintage Synth Repair

Hi guys,

I am looking at a Korg Wavestation EX with currently no backlight. I bought a new backlight foil and installed it - but still no joy.

I checked to see if the volts were there on the small plug feeding it and there's nothing.

Can any one confirm for me please what voltage I should be getting? And also, would anyone know what could be a common fault on these for a lack of volts here?

Cheers,
TOM