Help!

Wondering if anyone has encountered this problem. Canon 20D turns on, top LCD is working except it is not showing number of photos taken or left, but the back LCD is blank, and the camera will not take a photo.

This is my son's camera, he is in Canada right now visiting friends, and soon he will be flying to CA to actually shoot a wedding for a friend.

He has tried two different batteries....not sure what is going on...

ANy suggestion?? He is in a pinch!

Thanks!