I have an edifier m1315f. I've had it for around 6 months already. Just the other day, the left speaker wont work properly. It's not the connections. no loose wire or anything. if i switch the plugs of the left and right, the speaker is fine. the left speaker's port is not sending out signals anymore. For the past few days, i just unplug it and plug back in, and it will work well for the next few hours. but now, it wont work na jud. any suggestions?