Color Patches/Spots on the screen

Question

1.There are fixed Color Patches on the screen.I tried to use external de-magnetising(de-guassing) coil but they do not go away.How to get rid of them?

2.I need to have a remote control for this model.Which remote control would work?

3.Is it possible to get a circuit diagram of this TV ,Model# LG-CA21K52EX?