As I was finishing a wedding Thursday night, I hit Variation A, and it caved in completely. Lucky for me it was the end of the wedding, as the no matter what variation I went to afterwards, the keyboard invariably returned to loop "Fill in A".

I just opened it up to try to fix it - or even disable it if need be (and use a pedal instead), but found that the variation buttons are attached to a motherboard with at least 25 screws. Has anyone tried dismantling this before? What do you suggest? I definitely need to fix that button before my next wedding this coming Tuesday.

Thank you,
Chony

Here are some pics - sorry for the poor quality - I took them with a camera phone under bad lighting:
This one is of the broken button:
http://simchatunes.com/pics/IMG_0327.JPG

This one is of the motherboard:
http://simchatunes.com/pics/IMG_0328.JPG

This one is a wide picture of the whole T2 inside:
http://simchatunes.com/pics/IMG_0330.JPG

This one is interesting because you see how much space Yamaha wastes on the left and right sides of the keyboard:
http://simchatunes.com/pics/IMG_0332.JPG