windows 7 - how do I make my computer only play through my speaker even if headphones are plugged in?

My mini-jack input is broken, so my computer(HP pavilion dv6 Notebook) thinks there is headphones plugged in at all times. If I physically press lightly on the headphone intput location, speakers start working again. Even if headphones are plugged in, the cable needs to have tension in a certain angle to work. This is extremely annoying! Fixing it wud cost more than the computer is worth, and I can't afford a new one worth buying. I'm running Windows 7 with IDT audio. In all different options I've found, the speakers and headphones seems to have the same muscle. If I deactivate one, i deactivate the other. In fact, I cant find different options for them at all. Does anyone know a way I can force my computer to ONLY play through the speakers, even if headphones are detected? Not both at the same time, ONLY speakers!