I got a pioneer elite cld-99 laserdisc player making some bad noises. when you power it up it makes a clicking sound. When the clicking noise stops the code E4 is in the display. When you press the open/close button the error code L1 is in the display. I just got this player shipped to me and believe that it was not alway kept right side up by the shippers. Is there anything I can do myself to do further diagnosis on this?