Failed to validate boot image - Moto G Q&A, Help & Troubleshooting

im trying to flash stock 4.4.4 firmware on my XT1032 Retail.en.Us i did everything correctly, everything rturned with an OKAY, when i try to reboot i get a failed to validate boot image and im stuck in fastboot. Does anyone know how to fix this ? i really need help fast. my bootloader is unlocked

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Motorola Moto G - Flashing stock failing with fastboot

Hello everyone
I am new here.
I need some assistance with my moto g.
I previously unlocked my Moto G's bootloader but realised that I just wanted it on stock and locked so I didn't damage it, so I managed to relock my
phone's bootloader and got it back to a stock rom.
After installing a system update a few days ago, my phone came back with the
"Warning - bootloader unlocked!" logo after installing a system update.
So I decided to try and reflash the stock firmware and original logo.bin from the XDA Site.
However, my flashes are failing and my moto g is stuck in a bootloop with no rom to boot up to, I have adb minimal fastboot and motorola drivers
/ adb drivers installed.
What happens: I power on the phone into bootloader mode, then I try to flash the ROM I got from droid-developers site, but whenever I try to relock
my bootloader it shows the following:
...
Ready to flash signed images!
OK: (time)
I do fastboot flash partition gpt.bin and I get:
Preflash validation failed!
SST lock failure!
Also trying to issue the command to relock the bootloader gives me
SST lock failure!
I get other errors too when flashing the sparsechunk images, it gives: Invalid PIV signed image! and for motoboot and boot images it gives: Preflash validation failed!
version downgraded for boot.
etc
I cannot recover my stock rom due to these errors, I've searched everywhere (on google) and here and I am desperate to flash the stock rom back and relock bootloader again so I can use the phone.
I am really stuck and my phone will not get out of a bootloop
Any help is really much appreciated as I need to get my phone working so I can use it
You don't need to relock the bootloader. Just follow this tutorial:
http://forum.xda-developers.com/showthread.php?t=2542219​
lost101 said:
You don't need to relock the bootloader. Just follow this tutorial:
http://forum.xda-developers.com/showthread.php?t=2542219​
Click to expand...
Click to collapse
I followed the tutorial, but when I get to the flashing stage, I get:
Preflash validation failed,
SST lock failure!
And version downraded for gpt.bin
it seems to be failing to flash these files.
What do I need to do?
You need to provide more information for people to help you. Have you upgraded to 4.4.4?
I had a similar issue when rooting my phone, and all I had to do was unplug the phone from the computer, restart the phone and computer, and then try again.
GrammarNazi said:
I had a similar issue when rooting my phone, and all I had to do was unplug the phone from the computer, restart the phone and computer, and then try again.
Click to expand...
Click to collapse
But did you downgrade from 4.4.4 to 4.4.2?
What model do you have?
Can you explain us all the steps?
Thanks
First unlock your bootloader again. You have to downgrade from 4.4.4 to 4.4.3 then to 4.4.2. During the downgrades you have to follow the same kind of firmware (example: 4.4.4 retail EU -> 4.4.3 retail EU -> 4.4.2 retail EU). When you're done if you want you can relock the bootloader.

[Q] [URGENT][Help needed][Moto G failed to validate boot image]

HI
I was flashing the GPe image on my XT1033 and while flashing the boot.img and logo.bin i got an error - out of memory , but rest of the parts like system.img etc flashed properly and now my phone won't boot giving me the error "failed to validate boot image'.
I am stuck at the bootloader screen and now neither can i flash some other image since my phone isn't being recognized anymore with cmd showing the message 'waiting for device'
Can someone please provide a solution?
Hello.
I faced the same problems when installing the 4.4.4 br firmware and trying to revert to my original firmware.
This happens because you have a locked bootloader and/or maybe you flashed a wrong boot.bin and you can't reflash boot.img because the bootloader is locked!
What I did is unlock the bootloader and all my problems vanished.. -_- reflash all the files using mfastboot, if it gives you errors on gpt.bin and motoboot.img dont worry and go on with the rest.
Oh, and one strange thing that I luckily figured out, is that to get the device recognized by the PC in the fastboot mode you got to enter fastboot MANUALLY. THat is, press volume down 3 seconds and then power on.
It's gotta say: Fastboot reason: Volume-down key pressed.
If you try to boot and it enters fast boot and gives you the error, for some reason doesn't recognize.

[Q] Stuck on Bootloader Locked Screen

Hey guys
First of all: I think, I ****ed up.
So I was on a custom 5.0.2 Rom and it was really buggy (forceclose, lowmemory, etc.) and so I decided,
that it would be a good idea to go back to stock and flash Slimrom. As far, as I remember, I did the following:
1. Go into my custom recovery and delete everything (I know, I'm an idiot :crying: )
2. Go into fastboot and flash 4.4.4 via a script on my PC
3. Get problems, which I somehow resolve (pls don't ask me, how. I was pretty drunk last night.)
4. 4.4.4 is up and running. I download the stock 5.0.2 OTA files form XDA and try to flash them with TWM.
5. Everything is super buggy under 5.0.2, so I decide to flash back 4.4.4 and use the stock recovery.
6. 5.0.2 runs just fine and I begin to prepare for the custom Slimrom.
7. Install custom recovery, download Slimrom and GApps.
8. Flash Slimrom and get some weird error, that /system and /date can't be mounted. Everything ****ed up from there on...
9. Try to flash the stock 4.4.4 from before (using the script). Doesn't work, gets stuck on bootloader unlocked messege.
10. Try random **** (literally everything, I can find on the web.)
11. Write this post.
Some information, you could need:
XT1032
Fastboot version: 41.18
Unlocked (Status Code: 3)
Boots into recovery
Recovery is TWM 2.8.6.0
Things, I've tried: Flash the stock 4.4.4 system and then flash a custom rom, using TWM Didn't work
Reflash the stock "Kernel Module", found under /showthread.php?t=2649763 Didn't work
Flash an alternate "bootloader unlocked" Screen Didn't work
Please help me, guys :fingers-crossed:
Did you try manually flashing each partition for the 4.4.4 stock ROM? Since you are on a 41.18 bootloader, you should be able to flash every file except motoboot.
audit13 said:
Did you try manually flashing each partition for the 4.4.4 stock ROM? Since you are on a 41.18 bootloader, you should be able to flash every file except motoboot.
Click to expand...
Click to collapse
First of all, thank you for your quick response!
I was able to flash everything without any errors, but unfortunately, it is still stuck on the Warning screen.
Did you erase cache and userdata in fastboot?
audit13 said:
Did you erase cache and userdata in fastboot?
Click to expand...
Click to collapse
Yes, but it did not help
Edit: it gives me an error, when flashing gpt.bin.
it says:
(bootloader) Preflash validation failed
FAILED (remote failure)
So all files flahed except motoboot and gpt? The motoboot file from the stock 4.4.4 flash won't install becuase the 4.4.4 bootloader is older than the bootloader currently installed on your phone.
Even if the gpt.bin file doesn't flash, it doesn't always prevent the phone from booting a stock ROM.
Was the 5.02 ROM the GPE?
audit13 said:
So all files flahed except motoboot and gpt? The motoboot file from the stock 4.4.4 flash won't install becuase the 4.4.4 bootloader is older than the bootloader currently installed on your phone.
Even if the gpt.bin file doesn't flash, it doesn't always prevent the phone from booting a stock ROM.
Was the 5.02 ROM the GPE?
Click to expand...
Click to collapse
When trying to flash the motoboot.img, it says "permission denied" and when trying to flash the gpt.bin, it says "(bootloader) Preflash validation failed FAILED (remote failure)".
The 5.0.2 ROM was the OTA update, which in my case, is the normal motorola one. I did convert my device to a GPE, when Lollipop for the moto G GPE became availible (arround december),
but went back to the normal ROM to get the 5.0.2 OTA.
Thank you for your help :laugh:
Ok, I have used this: http://forum.xda-developers.com/moto-g/development/rom-4-4-4-stock-eu-1-click-easy-flash-t2879757 and i'm back in Stock 4.4.4. I have got no idea, how that worked but it's done
That's great that it worked.
If you want to get 5.02 OTA update, be sure to update Motorola Update Services app in the Play store before checking for updates.

[Q] Can't Flash cricket Moto G xt1045 back to stock PLEASE HELP get error

When i try to flash the phone back to stock with the cricket stock recovery image it fails It worked before but it's not working this time PLEASE HELP!!!
I get this error while phone boots up
version downgraded for boot
failed to validate boot image
fastboot reason: Fall-though from normal boot mode

Unable to flash stock rom on moto g turbo (XT1557).

I'm unable to flash stock rom on my moto g turbo xt1557, with the fastboot method,
the actual problem is when i try to flash gpt.bin in the command getting the error
preflash validation failed remote failure.
since i've flashed this rom earlier it was succesfull at that time then i have installed twrp to try lineage os.
as now i want to revert back to stock , im unable due to the following error.
i'm trying the latest version of the stock rom which is availables\ still getting the error.
Please help.:crying :crying::crying:
Thanks :good::good::good:
vishal4950 said:
I'm unable to flash stock rom on my moto g turbo xt1557, with the fastboot method,
the actual problem is when i try to flash gpt.bin in the command getting the error
preflash validation failed remote failure.
since i've flashed this rom earlier it was succesfull at that time then i have installed twrp to try lineage os.
as now i want to revert back to stock , im unable due to the following error.
i'm trying the latest version of the stock rom which is availables\ still getting the error.
Please help.:crying :crying::crying:
Thanks :good::good::good:
Click to expand...
Click to collapse
Just skip that and do all commands,
Ojas25.8 said:
Just skip that and do all commands,
Click to expand...
Click to collapse
Dude. You mean to skip the flashing of gpt.bin
I have tried that too. Skipping the gpt.bin makes firmware flashing successful.
But after that problem is that phone get stuck on boot logo. Waited untill 30mins still no response.
vishal4950 said:
Dude. You mean to skip the flashing of gpt.bin
I have tried that too. Skipping the gpt.bin makes firmware flashing successful.
But after that problem is that phone get stuck on boot logo. Waited untill 30mins still no response.
Click to expand...
Click to collapse
Did you factory reset in stock recovery first? It's essential...

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