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[gigabad]

hi!
i got a tsop  chipped xbox vers 1.3 with evo 3935 and i got a problem i can only flash my bios with X2_4977  or older vers..., if i try new vers.. like 4980.06/4980.67 or 4981.06/4981.67  the xbox want boot.
The xbox only flashing red and no error code is  appearing  , i`ve checked the boot sequence   with   XBtool vers..1.0.16.0.
i dont understand what the problem is, please help.