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I have a lorex 2711 camera . It is 12 v DC input . I accidentally plugged it into 24 v AC. is it fix able. What does burn in side camera . Is there a fuse inside that might have been blown?

Kulwant Punghlia  those are in general not fused. They may have components that act like a fuse (inductors, resistors etc)but we would have to see. You will have to disassemble it and take a look at the circuit board for burned components. Schematics are not available so you will have to do some good trouble shooting. Once you have it disassembled post some good pictures of your board etc. so we can try and assist you further Adding images to an existing question