Knitting machine anyone?

I've had my Brother 910 electronic knitting machine for many a year now, and it has 'served me well', until recently when the transformer started smoking! After phoning a company in Norwich, (quite a way from here!) the man on the phone 'talked' my husband through how to dismantle the machine, so that only the broken part needed to be posted, saving a LOT of money. He also said that, when he returned it, he would, once again, talk hubby through re-attaching everything. HUH!! Not hubby!! When the part arrived, he said 'Oh it's fine, I can do it' - which he did -- BUT, (and only those with a knitting machine will know what I mean here..) I'm now unable to 'link' the ribbing attachment to the main bed!! Hubby thinks it's just because I've left it too long - he doesn't seem to realise I've been using the machine for nearly 30 years, so I know what is right and what is wrong!!! Is there anyone who can understand what I mean? I'm hesitating to phone the man in Norwich again, (it's been quite a few months since he repaired the part) as I'd really like someone to come to the house and look at my machine for me, but I can't find anyone in the Merseyside area. Can anyone help please?