[Scalping Chief]

ok a few of my buttons on my keyboard popped out when my dad went to clean the keyboard because it is very dirty and dusty know like tab,both shifts ctrl the a the Z is always capped when i click all these buttons the computer makes a weird nose like a error noise, does anyone know how to fix this without buying a new keyboard because i am poor and i dont even think i will be able to buy callofduty untill like christmas or so
i really need some help.