Homepin, thanks for your advice and I think i have done what you suggested.
I assume the MPU is the one behind the backscreen as shown here. I disconnected J205 and J206 pins, turned the machine back on and it made no difference.
Are you telling me I need to replace this whole board? IC U 20 is fixed in this board, so I guess that can't be replaced.
Is there any other way to test this, my brother is an electrician, are there any tests he could do?
Thanks for all your help so far.
