Reply to Some buttons on my VCI aren't working, need help :S

Hey guys, I'm having a problem with those tiny black buttons on the VCI-100 in the top left hand corner right under the red vestax logo. Like they only respond to being pushed sometimes and i have to push them like really hard, I'm not sure if it's able to be fixed or if I'd need knowledge of soldering but if anyone is able to shed some light on things I could do to fix them that would be great