Static shock hurt my Harmon Kardon AVR 140 Receiver - no EQ!

[mlannoo]

about a year ago i accidentally shocked my Harmon Kardon AVR 140 receiver when i reached to adjust the EQ knobs. it was a super-shock! i could see a little lightening bolt and it totally stung my finger! anyway, since then, my BALANCE, TREBLE and BASS CONTROLS on the front of the unit no longer work. everything else with the receiver is fine, just no more EQ. i opened up the unit and looked for obvious things like fuses, loose connections etc. - no luck. anyone have a thought on what to do? i would hate to ship this to their repair shop and wait 10 weeks and spend almost as much as the thing cost. thanks.