Hi all, first post here. I am hoping that you can help me climb over this wall I have struck. I am attempting to fix a buddies 360 that is showing the error that basically says "Put this disc in a xbox 360 to play it" blah blah blah. After doing my initial research I found several possible causes, so I started tackling them. The drive in question is a Hitachi GDR-3120L, ROM version 0079FL. So, the first thing I did was disassemble to xbox, and then the drive, in order to clean it out. Using compressed air, a shop vac, and a tiny bit of rubbing alcohol on the lens I made sure the drive was squeeky clean. Reassembled and found that nothing had changed. The problem persists. Next, I replaced the laser lens assembly with a new unit ordered off amazon. The swap was super easy and I thought for sure it would work. I was wrong. No joy, the problem remains. Now, I have my own 360 which recently RROD'd for the second time. When it RROD'd the first time I replaced the xclamps and used the washers and all that. It fixed my rrod, somewhat, and lasted a few months before rrod again. My xbox happens to have Hitachi drive, ROM version 0046DH. From my research it seemed that I should be able to take my known good drive and swap the pc boards. So I took my drive from my 360, put the pcb in from the bad drive, and reassembled. I just KNEW this would fix it. It didn't. The problem persists. Next, I broke out my multimeter and adjusted the pot on the laser. I adjusted from 4500 down to about 3400. I was absolutely sure t hat I'd fixed it this time. I was wrong again. I should mention, though, that at this time the original PCB is back in place. So, now I've hit the wall. I don't know what else to try. This xbox has had multiple owners and the warranty sticker was NOT intact when I opened the case the first time. However, it doesn't appear to have had an xclamp replacement done. That all looks factory. That makes me think that someone tried to mod the drive to play 'backups' at some point and probably screwed it up. So, if this happened, and if they saved a backup of the original firmware, it's long gone. What can I do now? Can I pull the key from the broken drive somehow and push it onto my pcb and use that drive? Any help would be GREATLY appreciated. Thanks to all for wading through my mess of troubleshooting.