I see you have relisted your question , i will try to assist you on your washer issue.
My name is Woody.
I will be glad to assist you today.
I have been servicing ALL Major Brands of Appliances for 35 Years,
and have over 100,000 in home repairs and over 80,000 internet repairs under my belt.
You only have one MAIN control board the second control board is the motor inverter control board
Yes if you put over 120 volts into the unit ,it would have damaged the main control board first , the display control should not have been affected.
Nor the motor inverter either.
And yes that main control is very costly.
In fact I personally would not even replace the control board ,I would just replace the unit.
But if you do want to replace it ,here is a like to the part.
The link below is to the part you will need from a highly recommended company rated A+ with the Better Business Bureau.
They offer a 100% money back guarantee, EVEN ON INSTALLED ELECTRICAL PARTS, for an entire year!
They are the only company to allow returns on installed parts for a refund and offer a FULL ONE YEAR WARRANTY!
If you have any questions just reply back.