Sounds like its fried mate...sorry... This happend to me a few months ago. Andrews wouldnt replace it because it was a bit beaten up but did offer me a cheap replacement.
Just last week i think something similar has happend to replacement aswel, its turning on but freezing and wont guide at all.
Ill be sending it back and giving it one more chance, if I get another electrical problem ill bail on SW mounts.
