The most common cause of this is a failure of an internal op-amp IC. While the part itself is inexpensive, access to it is tricky. These models also use surface mounted devices which are more difficult to replace without the proper equipment and practice. This repair should not exceed $100 in total cost. The parts will run about $5 or so.
Answers & Comments
Hello,
your mixer is due for servicing. Open the mixer, clean the board panel inside, couple it back and put it on again.
I'm sure its an internal problem.
Good luck.
The most common cause of this is a failure of an internal op-amp IC. While the part itself is inexpensive, access to it is tricky. These models also use surface mounted devices which are more difficult to replace without the proper equipment and practice. This repair should not exceed $100 in total cost. The parts will run about $5 or so.
Dan