Hi! Guys
I have just finished verifying my code with 16f648 and works Fine!
I was just about to mention to check lcd initilization, contrast, etc but you have already found it by yourself so.... ALL is FINE!

I hope you have success make it work with F877
Nokia lcds is a perfect option for projects.
Also download Nokia lcd pdf it will be very useful for seting differnet parameters to lcd

I am here for any help.