i need help

My samba maraca does not detect the height properly anymore, and only stays on one circle on the screen.

I opened up the height sensor on the defective maraca controller, and checked for problems although there are none apparent. has anyone else had problems like this? I am using the cha cha maracas, which worked well up until now.

The still light up, the start button and the shake still work fine

anyways, and help would be appreciated