What’s going on with my Sago?

[Jayme J]

It’s been this way since I bought this house 4 years ago.  Though, it seems to be getting worse.  Is it manganese deficiency?  Doesn’t quite look like what I can google.  South Florida here.  Soil is mostly sand

[Merlyn]

@Jayme J did the new fronds grow out with the random brown spots, did they develop just as the flush was "hardening off," or did they turn brown later?  Manganese deficiency shows up during or near the end of the new flush.  One possibility is hail damage, since it is so random.  It is not Magnesium, as that would show up as yellow tips on the oldest leaves.  I would also check for CAS (Cycas Aulacaspsis Scale) on the underside of the fronds.  I don't see any in the picture, but sometimes they only infest the bottom side at first.