screen displaying black. Back lighting works.

My iphone's not displaying anything.

The back-lighting is working, but nothing is displayed.

I've replaced the LCD assembly hoping for luck, but it does the same thing.

Any ideas?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0