I got an old Core model Xbox 360 with a stuck shut disc drive for free. It has the Xenon board with the Hitachi-Samsung disc drive. Both are unmodified to the best of my knowledge. Anyway, after disassembling the Xbox and disc drive, cleaning them, and putting them back together the results were initially promising. The drive opened and closed again with no problems. Then I tried playing a game, which booted up fine, but the Xbox soon crashed, rebooted, and the DD was stuck again. Manually opening and closing it fixes the stuck shut problem, but it keeps occurring. I then tried using contact cleaner on the open/shut detection switch and tweaking the pot a little, both to no effect. In conclusion, is there something else to try or is it a lost cause?