Omni High Frequency squealing

I have a very clean 2012 Avid Omni that now squeals the most horrible sound out of my speakers, it definitely the output stage, not on the dig out.



Really really annoying, everything else is fine but it needs fixed. Avid would like $1100 to fix it ! (which is less than a new one) friggin thing is only 3 years old, does anyone know of a repair place that can look at it or has anyone else heard this horrendous squealing ?



Pretty mad I have to actually buy another one to fix this one !



Meet the Fockers



thanks