Lowrsnce hds 8 and hds5 set up help

[SpookFreak]

I have these 2 units. The 5 is at the bow and the 8 is at the helm. Each have transducers plus 1 structure scan.
Lost temp and depth setting on the 5 and 8
Not sure how to get them back. Went into pages and they are turned on. Both are flush mounted. They were set up when I bought the boat it's a 518. Can't find anyone who knows how the systems work together. Anyone know of someone who can help? Thanks