That sounds like, if you'll pardon the pun, you have a bad audio jack. That in turn, since it's an integrated audio chip, means motherboard replacement. So if the unit isn't under warranty, I'd just spend $50 or whatever on a new sound card rather than a couple hundred getting a new motherboard. If you want to try using google to read up on ways to attempt repairing the bent pins inside the jack you can, but it's probably just going to make things worse if you attempt that.
Hey, i have a big problem with my computers speakers. About a week ago my sound started to mess up and the only way to hear anything with my headset was to plug it in only half way, if it was plugged in the whole way i couldnt hear anything at all. With it plugged in half way though I can barely hear at all. I bought a new headset and have the exact same problem so i know its my computer. This is a 2011 hp computer and OS is windows 7. I googled my problem and some people talk about sound cards and drivers so I dont know what i need to fix my computer. I have teamviewer if someone wants to come on my computer and try to help if needed. This is unbearable and i really need it fixed!
speakers name is Realtek High Definition Audio
driver name is RTKVHD64.sys