sound doesn't work

[billyfufu]

my computer won't detect my headphones i went on a 2 week trip(before it was working) and now it doesn't work i think it might be the case or some part of the pc i might of disconnected something that i don't know because i'm new to computers please help

the back ports work but the front doesn't

 

[billyfufu]

the back ports work but the front doesn't

i might of disconnected something

I would try to reconnect the wires that you disconnected.

that's the thing i don't know which one i disconnected