error 250 is a bad block, that cant really be fixed, like its not a soldering problem or anything, either use xnandhealer to remap that bad block, or when you build xebuild image, just flash it with rawflash in xell, it handles bad blocks for you
Build your xell image, then flash that to xbox, boot into xell, get cpu key, build xebuild image with your nand that has bad block, and cpu key, put that xebuild image on usb flash drive rename to nandflash.bin . and put rawflash on usb as well http://www.xbox-scene.com/xbox1data/sep/EFEAZklVlVRQQeyGGD.php . then boot into xell, its should flash your xebuild image, and work fine
---------- Post added at 20:45 ---------- Previous post was at 20:44 ----------
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