the wire or cable of my desktop computer keyboard was bitten by a rat 3 months ago and someone fix it and it works but suddenly just today it stop working and i don't know what to do or how to fix it again please help me
assuming it is a usb keyboard, you should be able to solder a new wire on. There are many tutorials on how to solder/ how to solder usb cables. Also you could just buy another keyboard (and maybe some rat poison while you are at it).