Serial keys are not working on my keyboard for some reason

the whole numbers row except backslash doesnt work. aswell as the entire fn row including ESC and the ones on the right print screen. etc. I have tried everything i think, unplugging. closing all synapse apps, cleaning the keys shouldnt be a problem cause it happened randomly while i was on my pc not sure what caused it to happen though, its werid there must be a fix since only sdetermined keys dont work as if something disabled them