Chosen Solution
I bought 4 used galaxy s6 ..so they have broken screen… I can fix broken screen on galaxy s5 and I have tried to fix all of them. But when I first connected the lcd to motherboard on galaxy s6..that was working…and then I disassembled lcd and battery …and assemble all of parts of galaxy s6…..suddenly 3 galaxy s6 had same problem as has static screen like url All of phone are not working…I thought that was not lcd’s problem…. Maybe there were all something wrong in procedure… How can I fix that…could you please tell me about the way to solve that?https://youtu.be/osB0mB-Yp80
Either some components near the display connector got damaged or the screen itself is defective. It’s fairly expensive to try another screen but if you have another one at hand try that.