What is this disease?

[lucky1]

I inherited a Valencia (I think) orange tree in my front yard. Recently I started noticing black lesions on some of the branches, along with dark brown sap and white spots. The trunk looks ok I think, although there are some small spots that could be fungal. 

What could it be?

[poncirusguy]

uNFORTUNATLY WE NEED PICTURES AND THIS SITE IS ALMOST IMPOSSIBLE TO ATTACH THES PICTURES.