flashed Liteon 74850C with lt 3.0. plays dvds and original games. when put backups says Unrecognized Disc 03-80-00. backups work on other 2 xboxs fine. tested disk for quality everything is in specs. flash is fine details in bottom from jf log. used both memorex and verbatim. the only thing i can think off is that laser is getting old and needs to be replaced, but not 100% sure on that.