it is not working can you help?

i have toyota estima x ltd(T)import i have a problem with my audio cd dvd reverse camera not working but still can hear the reversing censer's. the model number of my in car audio system is FUJISTU TEN 135000-1080A101 can any1 can help with this because i cant not find a fuse for this audio system if anbody know please tell me the location thankyou. My Email is imyr34@hotmail.co.uk