I have ccme 3.3 with a 7960 and 7914 sidecar. I did have lines on the sidecar buttons at one time but I have removed them. The phone was working and nothing on the phone system changed but now when the phone starts up the sidecar stays amber and never boots. I have verified the connection but it is still the same problem.
tftp-server flash:S00104000100.sbn
load 7914 S00104000100
ephone 10
mac-address 0016.4736.9081
type 7960 addon 1 7914
button 1:1 2o20,21 3f80 4f81 5f82 6f83