I've never considered owning laserdisc, but my budding HT just seemed incomplete without one. So, I started my hunt and found a Pioneer D504 on Ebay - with the seller nearby so I avoided shipping costs. I played it twice and really enjoyed it. Then - disaster. Now the tray will not open. It acts like it is stuck and displays "E3". He won't admit it, but I think my teenager pushed the tray to close it instead of using the button. Has anybody had this problem and solved it?