Lost Ku via 922

Which of course is about half the channels...

Think I had a close-by lightning hit a few weeks ago, at which point
there was a power outage for several hours  (the subwoofer's power
supply was the other casualty...).

Noted that could not get Ku band the following week (digitals).  [Still
get the C band side okay, analog and digital, although perhaps the guide
is being a little more flakey than usual lately too...]

Replaced the Ku LNB with a new one.  It worked for a little bit (a few
minutes), albeit rather flakily (the signal seemed to fluctuate a bit,
and the picture seemed to go away when the signal strength dipped).  But
after about 3 or 4 minutes it went dark altogether again.

I suppose it could be wiring issue, but I would have to guess that
something got cooked inside of the 922.  

Any ideas?  Can LNBs be fried by such a thing (kind of pricey
diagnostic..)?  [Are there fuses inside the 922?]

Have about half a year of C+Ku subs left?  Do you think they (NPS) would
transfer them to a new (i.e., different) box?

Thanks...

--Frank

PS  Any estimate of typical price to service a 922?