Hello. Ive been trying to connect my laptop or phone to an old dvd player, i bought av/aux cable (red and white with aux) and when i connect it, i hear a very silent hiss sound, and when i play music, theres only that hiss sound, it shows on my phone that the music is playing, but all i hear is that small hiss sound, nothing works. That dvd has aux and usb. When i play music through usb, everything is perfect, and when i press USB button on the remote, it shows on the screen that its usb mode. When i press AUX, it doesnt show on the screen that its aux, it says "scart", and when i play, its just the hissing sound. Tried on two different laptops, and three different phones, it dont work, usb works perfect. What is the problem?