After replacing battery screen doesn't work, It shows faint grid lines
crwdns2934249:0crwdne2934249:0:
After redoing twice the whole step by step I did to add the new battery, the screen is still unresponsive. I can see a faint grid lines and both slides to "UNLOCK" and "POWER OFF" don't work.
What can I do next to fix this unexpected problem?