The sound from external speakers is muffled unless I pull the connecting-wire plug halfway out of the laptop's audio port. But when I do that the cable doesn't stay in place unless I hold it. What explains this? What is the fix? Details: I have a Dell Studio 15, with Windows 7 64bit, video card=512mb ATI HD 4570, sound=High Definition Audio 2.0. I run video & audio out to a ceiling-mounted projector & speakers with a cable that goes from the laptop into the wall. The laptop has two outputs marked with headphone symbols that seem to be the same.