crwdns2933897:0crwdne2933897:0

Why does my cameras say failed?

I open my camera and it says failed before I can even take a picture. I've tried all the quick fixes I've read online. What pieces do I need to replace in order for any of my cams to work without failing?

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

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 1
crwdns2934285:0crwdne2934285:0