Same on my Beovision 1, with ML-socket but no installed ML-card.
I had luck on ebay and got a ML-card very cheap.
Dont recall the model no, but I have the installation manual somewhere:-) if you want to know the type no.
I think it´s the same for Beocenter 1 and Beovision 1.
I really like this tv-set, it´s good looking from every angel......