> Surge had to have came in on coax because plasma tv, dvd player and
> pc all on same surge protector and they are fine.
First learn how surges do damage. A surge is an electric current that simultaneously exists everywhere in the path from cloud to earth. If a surge is incoming to a receiver, then the same current is also outgoing via some other path. Electricity as taught in elementary school science. A surge incoming on AC mains is the same current outgoing to earth via the coax connector. The naive will assume it entered o the coax. But that was the outgoing path to earth.
You have assumed a protector somehow stops what three miles of sky could not. It doesn't. Protector located adjacent to equipment does not even claim to protect from that type of surge. Superior protection already inside those other appliances protected them. Other damaged electronics acted as superior surge protectors. Created a better connection to earth.
No protector stops, blocks, or absorbs surges as you have assumed. Either the protector connects that current low impedance (ie 'less than 10 feet') to earth. Or that protector gives a surge even more paths destructively via an adjacent appliance.
The LNB was damaged. So what was the incoming and outgoing path via the LNB? One could be a direct strike to the dish. Through the LNB, through its coax cable, and then destructively via the receiver inside. Even human safety codes say that dish must be earthed. Not safety grounded. Earthed - a completely different ground. Then the path from cloud to earth need not pass through the LNB.
Another suggested grounding the coax. Yes. But coax must be earthed to the same ground rod used by AC electric and telephone. If not, then damage is made easier. Again - low impedance (a 'less than 10 foot' connection from coax to earth ground rod).
Protection is never provided by a protector. Effective protectors either connect that current low impedance (ie wire not inside metallic conduit, no splices, no sharp bends, etc) to single point earth ground. Or a protector does not do protection.
A hardwire from the coax to earth ground does best protection possible. No protector required. AC electric also needs protection. But AC electric wires cannot be hardwired to earth. So we make that connection via a protector instead of a wire. A protector (all protectors) is only as effective as its earth ground. A protector without earthing (ie located next to the receiver) does not even claim to protect from typically destructive surges.
Fix damaged appliances. And fix reasons for that completely avoidable damage.