Hi. I have memories of lot of things with color in the name, do you have a model number?
I am indeed not related to BOSE but i expected the device to be a BOSE product. I don't have one with me to inspect how it is made but from online picture it look like the control is a membrane button strip. Perhaps you did not positioned it back perfectly. It might also be a crack on the PCB board (hard to see with naked eyes) or a surface mount chip may have lifted or gone free in the enclosure. Sometime instead of an elastomere button strip, small metalic contact disc-dome are used (like in old atari joystick) and those can slide out of position).
It might be. Those rubber strip have a carbon coating for electrical conductivity. If some dust front the floor covered them it might be enough to reduce contact. It is often easier to test them without the top surface on them, that way you can use other button and allign them to test button individually on the contact you want.