Hello
Try this:
-Initialize the player .Method : press and hold PAUSE SKIP/SEARCH
OPEN/CLOSE buttons on the player
-check the laserdrive current .Method:with no disc in the player,press
DISPLAY button on the remote control while pressing PAUSE and
OPEN/CLOSE buttons on the player.If the value is more than 70 (mA)
,replace the optical pickup
I've meet many cases with this problem and after initialize ,80%
work ok,about 20 % require Optical Pickup replace.I thinh this is a
software fault problem !?
Hope this helps.

Vo Hung from Vietnam