baseband missing

Hi I been flashing the CM 12.1 nightlies, starting from the mexican 5.0.2 stock firmware for a while. Suddenly, the power button and the screen got unresponsive.... i've tried to flash back to stock several times, either kitkat or lollipop, with the same results... The only different thing I noticed was when I started the bootloader menu the baseband line was empty. One of the times I flashed to stock it came back and start working correctly, but when I flashed CM again the same thing happened.

Now I have the baseband line black and the OS keeps crushing....
I tried flashing the radio only with the same results....
Any thoughts?

PS: RSD lite 6.2.4 doesn't recognize my devices so I flash with cmd and mfastboot using these commands:

mfastboot getvar max-sparse-size
mfastboot flash motoboot bootloader.img
mfastboot flash radio radio.img
mfastboot flash logo logo.bin
mfastboot flash boot boot.img
mfastboot flash recovery recovery.img
mfastboot flash system system.img_sparsechunk.0
mfastboot flash system system.img_sparsechunk.1
mfastboot flash system system.img_sparsechunk.2
mfastboot flash system system.img_sparsechunk.3
mfastboot flash system system.img_sparsechunk.4
mfastboot flash system system.img_sparsechunk.5
mfastboot flash system system.img_sparsechunk.6
mfastboot flash system system.img_sparsechunk.7
mfastboot erase cache
mfastboot erase userdata
mfastboot erase clogo
mfastboot oem fb_mode_clear
mfastboot reboot

Please help!