I just bought a Aiwa HS-JX505, and everything seems to work great except I can only hear sound in the left headphone.  Does anyone have an idea what might be wrong?  I tried resetting it by pressing "Memory/Set" and "Up/Hour" together, but the problem didn't go away.  I can take pictures of it if you need me to.  I don't know if it makes a difference, but I'm missing the remote and I don't have the original headphones that go with it.  Thanks so much for any help in advance.     

You most likely have a JX505 with bad capacitors. It is a common fault in this model.