Broken Load Buttons on he MC 4000

Anyone else suffered any malfunctions with the MC4000?

My load buttons have just stopped working altogether and seems to hardware not software?

Hopefully, you got this issue sorted. If it wasnt just a mapping isse, then our service centres can be located via this page: http://www.denondjforum.com/t/denon-dj-service-centers-globally/7617