K4 K4NT won't boot and can't use diags mode.

So yesterday i reboot my kindle and get stuck on loading at 1/4 in. If I restart, it loads until the same place. With mfgtool I can put it on fast boot, and so I did, then with fastboot I flash the kernel 4.0.0, the diags kernel 4.0.0 and the mmcblk0p2, all went ok. I then restart to diags but i can't read anything, because the display gets weird, like the screen controller get corrupted, but then I reboot in normal and I see the load bar again, only that I get stuck in the same place than before.
In the pc I get a external drive when I connect the kindle but it has 0bytes.
I have no more ideas, can you help me?
Sorry for my lame English, in from Uruguay :cool
http://imgur.com/HbuXTMr