Panasonic DVD-LS50 7-Inch Portable DVD Player
I also managed to fix Code H03
Like reviewer Code H03 Jedi, I fixed my out-of-warranty unit. <br /> <br />After taking apart the unit per Code H03 Jedi's instructions, I inspected the transport and gears.  Turning the gears gently did not cause the worm gear that moves the actual transport to turn.  Looking more closely, I saw that there were small grains of sand in the grooves of the worm gear. I removed these with the tip of a precision screwdriver.  I also removed the black plastic cover that attaches with two screws over the gear train near the small transverse motor.  There were a few grains of sand there as well.  There was some clear grease on the gears that tended to make foreign matter adhere. <br /> <br />After removing all foreign material and reassembling the gear cover, I checked to see if the gear train would passively spin and it did.  I tried playing a DVD on the bare transport with the case still open and the disk spun and the laser transport moved and began to read the disk.  I reassembled and everything worked perfectly.  <br /> <br />I would add that when reinserting the screws, always turn each screw backwards a turn or two until you feel a click (which is the screw dropping into the old threads) before rotating clockwise.  Otherwise, the self-threading screws will self-thread again which will wear out the screw holes if you need to take it apart more than once.  Also be sure to remove the power while working within and observe electrostatic precautions. <br /> <br />This is a great DVD player, and well worth the effort to repair! <br /> <br />