If you had a sever electrical storm in the area it could be an EMP burst that wiped out the system, the only fix for this is all new stuff, (except for the dish) a new out of the box LNB and FTA receiver along with new coax and any type of switch that was attached wold be needed.
See lightning does not have to directly hit the equipment, if large enough a close by hit can wipe out most sensitive electronics with a large magnetic pulse,(EMP) it has also been shown that a lightning hit in certain areas can cause secondary sparks off other metal ground objects in the area of the main hit, these secondary's can be several feet to several hundred yards from the main hit, also a hit on the AC electrical service in the area can travel for miles.
Also a system that was only grounded with a standard ground block is not totally protected from lightning, a gas discharge device should also be used in areas prone to lightning, this device will protect the center conductor and help keep the lightning from getting inside the building, I also use a UPS system on the AC power to the inside equipment as a standard cheap surge protector may not stand up to a big pulse from lightning.