DA without PA, Does it help?

[Yellow2000]

My site has been getting great conversions for over a year, My lead count has been increasing monthly. But since january my traffic started decreasing  then at the end of march the traffic dropped in half. I think it was called Update Fred. Yet i have only lost rankings for a few keywords.That i can see. I went from 30-40 leads per day down to 10 per day. The few keywords which dropped are most likely the guilty keywords i use to get my traffic from .

At this point I started studying my backlinks to see how they are looking. I noticed alot of High DA links which mostly have PA-1.. My question is ...Will DA alone give me the link juice i need to gain top positions?

[Linda-Vassily]

It probably depends on the site. There are some high-authority sites that are basically platforms for other sites, so in that case, no.

I would think a relevant link from an integral but low-authority page on a high-authority site would be a plus, especially because the authority of that page might be higher than you think (maybe Moz just hasn't found its other links yet, for example).

As far as your problem, to start, I'd take a close look at the pages that used to convert and see if there are any on-site improvements you can make. Use the on-page grader and make sure you have your bases covered on that end.