[Moto G4 Play Guides, News, & Discussion] butcher211:
Hello,

I did it again now with the stock ROM HARPIA_MPI24.241-15.3_cid50_subsidy-DEFAULT_regulatory-DEFAULT_CFC with following results:

C:\Users\butcher211\Downloads\ADBFastboot>"retail_AS+lock.bat"

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe oem lock begin
...
(bootloader) Please fully flash the signed build before locking phone!
OKAY [ 0.053s]
finished. total time: 0.053s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash partition gpt.bin
target max-sparse-size: 256MB
sending 'partition' (32 KB)...
OKAY [ 0.016s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.440s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash motoboot motoboot.img
target max-sparse-size: 256MB
error: cannot load 'motoboot.img': No error

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash logo logo.bin
target max-sparse-size: 256MB
sending 'logo' (1216 KB)...
OKAY [ 0.038s]
writing 'logo'...
OKAY [ 0.201s]
finished. total time: 0.270s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash boot boot.img
target max-sparse-size: 256MB
sending 'boot' (16384 KB)...
OKAY [ 0.617s]
writing 'boot'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 1.172s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash recovery recovery.img
target max-sparse-size: 256MB
sending 'recovery' (16484 KB)...
OKAY [ 0.633s]
writing 'recovery'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 1.187s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.0
target max-sparse-size: 256MB
sending 'system' (262141 KB)...
OKAY [ 9.733s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 10.212s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.1
target max-sparse-size: 256MB
sending 'system' (260732 KB)...
OKAY [ 9.710s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.757s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.2
target max-sparse-size: 256MB
sending 'system' (262142 KB)...
OKAY [ 9.772s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.810s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.3
target max-sparse-size: 256MB
sending 'system' (244219 KB)...
OKAY [ 9.108s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.140s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.4
target max-sparse-size: 256MB
sending 'system' (247022 KB)...
OKAY [ 9.201s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.229s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.5
target max-sparse-size: 256MB
sending 'system' (262141 KB)...
OKAY [ 9.711s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.774s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.6
target max-sparse-size: 256MB
sending 'system' (262142 KB)...
OKAY [ 9.788s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 9.826s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.7
target max-sparse-size: 256MB
sending 'system' (121236 KB)...
OKAY [ 4.528s]
writing 'system'...
(bootloader) Invalid signed image
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 4.550s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash system system.img_sparsechunk.8
target max-sparse-size: 256MB
error: cannot load 'system.img_sparsechunk.8': No error

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash modem NON-HLOS.bin
target max-sparse-size: 256MB
sending 'modem' (37056 KB)...
OKAY [ 1.382s]
writing 'modem'...
OKAY [ 2.591s]
finished. total time: 3.989s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe erase modemst1
erasing 'modemst1'...
OKAY [ 0.016s]
finished. total time: 0.016s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe erase modemst2
erasing 'modemst2'...
OKAY [ 0.007s]
finished. total time: 0.007s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe flash fsg fsg.mbn
target max-sparse-size: 256MB
sending 'fsg' (1500 KB)...
OKAY [ 0.053s]
writing 'fsg'...
OKAY [ 0.132s]
finished. total time: 0.201s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe erase cache
erasing 'cache'...
OKAY [ 0.031s]
finished. total time: 0.031s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe erase userdata
erasing 'userdata'...
OKAY [ 2.159s]
finished. total time: 2.159s

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe oem lock
...
(bootloader) Please flash valid signed images just after lock begin
(bootloader) command!
OKAY [ 0.038s]
finished. total time: 0.038s

C:\Users\butcher211\Downloads\ADBFastboot>pause
Drücken Sie eine beliebige Taste . . .

C:\Users\butcher211\Downloads\ADBFastboot>mfastboot.exe reboot
rebooting...

finished. total time: -0.000s

The problem: It is still unlocked. Can please someone assist me at going back to stock with a normale locked bootloader please?

*EDIT*

Guys I realised that i bricked my device now. Please help me :(