[Moto G 2015 Q&A, Help & Troubleshooting] Nachiturbo:
Hello everyone, i have a Motorola Moto G XT1543. Last night i was writing a message when suddenly my phone freezes, i reebot the phone (power + Vol down pressed) but i got this message:

AP fastboot Flash Mode (Secure)

Failed to validate boot image

ERROR: Failed to pass validation, backup to fastboot

Fastboot Reason: Fall-trough from normal boot mode

CID Read Failure

Invalid CID status 0x69

I tried to install a stock rom with fastboot tools but i get several errors in the process

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash partition gpt.bin

< waiting for device >

target reported max download size of 268435456 bytes

sending 'partition' (32 KB)...

OKAY [ 0.002s]

writing 'partition'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.416s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash bootloader bootloader.img

target reported max download size of 268435456 bytes

sending 'bootloader' (2546 KB)...

OKAY [ 0.111s]

writing 'bootloader'...

(bootloader) flashing sbl1 ...

(bootloader) Failed to erase partition

(bootloader) Failed to flash sbl1

FAILED (remote failure)

finished. total time: 3.057s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash logo logo.bin

target reported max download size of 268435456 bytes

sending 'logo' (917 KB)...

OKAY [ 0.029s]

writing 'logo'...

(bootloader) Failed to erase partition

(bootloader) Failed to flash partition logo

FAILED (remote failure)

finished. total time: 0.185s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash boot boot.img

target reported max download size of 268435456 bytes

sending 'boot' (16384 KB)...

OKAY [ 0.683s]

writing 'boot'...

(bootloader) Failed to erase partition

(bootloader) Failed to flash partition boot

FAILED (remote failure)

finished. total time: 0.744s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash recovery recovery.img

target reported max download size of 268435456 bytes

sending 'recovery' (16484 KB)...

OKAY [ 0.689s]

writing 'recovery'...

(bootloader) Failed to erase partition

(bootloader) Failed to flash partition recovery

FAILED (remote failure)

finished. total time: 0.742s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash system system.img_sparsechunk.0

target reported max download size of 268435456 bytes

sending 'system' (262141 KB)...

OKAY [ 10.354s]

writing 'system'...

(bootloader) Failed to erase partition

FAILED (remote failure)

finished. total time: 10.444s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash system system.img_sparsechunk.1

target reported max download size of 268435456 bytes

sending 'system' (262143 KB)...

OKAY [ 10.441s]

writing 'system'...

(bootloader) Failed to flash sparse image

FAILED (remote failure)

finished. total time: 10.565s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash system system.img_sparsechunk.2

target reported max download size of 268435456 bytes

sending 'system' (232372 KB)...

OKAY [ 9.261s]

writing 'system'...

(bootloader) Failed to flash sparse image

FAILED (remote failure)

finished. total time: 9.455s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash system system.img_sparsechunk.3

target reported max download size of 268435456 bytes

sending 'system' (233343 KB)...

OKAY [ 9.102s]

writing 'system'...

(bootloader) Failed to flash sparse image

FAILED (remote failure)

finished. total time: 9.216s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash system system.img_sparsechunk.4

target reported max download size of 268435456 bytes

sending 'system' (257138 KB)...

OKAY [ 9.915s]

writing 'system'...

(bootloader) Failed to flash sparse image

FAILED (remote failure)

finished. total time: 10.037s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash system system.img_sparsechunk.5

target reported max download size of 268435456 bytes

sending 'system' (221149 KB)...

OKAY [ 8.771s]

writing 'system'...

(bootloader) Failed to flash sparse image

FAILED (remote failure)

finished. total time: 8.887s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash modem NON-HLOS.bin

target reported max download size of 268435456 bytes

sending 'modem' (36944 KB)...

OKAY [ 1.481s]

writing 'modem'...

(bootloader) Failed to erase partition

FAILED (remote failure)

finished. total time: 1.555s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot erase modemst1

erasing 'modemst1'...

(bootloader) Failed to erase partition

FAILED (remote failure)

finished. total time: 0.031s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot erase modemst2

erasing 'modemst2'...

(bootloader) Failed to erase partition

FAILED (remote failure)

finished. total time: 0.035s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot flash fsg fsg.mbn

target reported max download size of 268435456 bytes

sending 'fsg' (2035 KB)...

OKAY [ 0.094s]

writing 'fsg'...

(bootloader) Failed to erase partition

(bootloader) Failed to flash partition fsg

FAILED (remote failure)

finished. total time: 0.154s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot erase cache

erasing 'cache'...

(bootloader) Failed to erase partition

FAILED (remote failure)

finished. total time: 0.047s

C:\Users\Ignacio\Desktop\Herramientas necesarias Moto G 2015>fastboot erase userdata

erasing 'userdata'...

(bootloader) Failed to erase partition

FAILED (remote failure)

finished. total time: 0.056s

Please help!!