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[Please help] Can this work? Idea for rooting Lenovo TB-7504X - Printable Version

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+--- Thread: [Please help] Can this work? Idea for rooting Lenovo TB-7504X (/thread-26363.html)

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Can this work? Idea for rooting Lenovo TB-7504X - Burns - 01-09-2019

I’m trying to root my Lenovo TB-7504X. I think there is no known way to unlock the bootloader via fastboot. So, I came up with this Idea.
1.      use Magisk to patch a boot image (boot-sign.img)
2.      use SP Flash to load the boot image to the tablet
Can this wok or will it brick the device?
The problem is that I don’t have an auth file but there is a tool by Lenovo for recovery. It is downloading a Firmware form the Lenovo serves and using SP Flash to load the FW to the device.
So maybe I can replace the boot-sign.img with the patch one and let the Lenovo tool load the Firmware…
What do you think?


RE: Can this work? Idea for rooting Lenovo TB-7504X - innagee - 01-09-2019

(01-09-2019, 10:52 PM)Burns Wrote:  I’m trying to root my Lenovo TB-7504X. I think there is no known way to unlock the bootloader via fastboot. So, I came up with this Idea.
1.      use Magisk to patch a boot image (boot-sign.img)
2.      use SP Flash to load the boot image to the tablet
Can this wok or will it brick the device?
The problem is that I don’t have an auth file but there is a tool by Lenovo for recovery. It is downloading a Firmware form the Lenovo serves and using SP Flash to load the FW to the device.
So maybe I can replace the boot-sign.img with the patch one and let the Lenovo tool load the Firmware…
What do you think?

You can try that but make sure to backup your phone's firmware and still make sure the firmware you backedup is flashable.

Sent from my M5 mini using Hovatek Mobile


RE: Can this work? Idea for rooting Lenovo TB-7504X - freshtyt - 01-10-2019

(01-09-2019, 10:52 PM)Burns Wrote:  I’m trying to root my Lenovo TB-7504X. I think there is no known way to unlock the bootloader via fastboot. So, I came up with this Idea.
1.      use Magisk to patch a boot image (boot-sign.img)
2.      use SP Flash to load the boot image to the tablet
Can this wok or will it brick the device?
The problem is that I don’t have an auth file but there is a tool by Lenovo for recovery. It is downloading a Firmware form the Lenovo serves and using SP Flash to load the FW to the device.
So maybe I can replace the boot-sign.img with the patch one and let the Lenovo tool load the Firmware…
What do you think?

you would need to unsign the boot.img before patching, see https://forum.hovatek.com/thread-21005.html
if you decide to try flashing patched_boot using SP flash tool and encounter the sign header error, then try the fix listed @ https://forum.hovatek.com/thread-439.html


RE: Can this work? Idea for rooting Lenovo TB-7504X - Burns - 01-10-2019

(01-10-2019, 10:31 AM)freshtyt Wrote:  you would need to unsign the boot.img before patching, see https://forum.hovatek.com/thread-21005.html
if you decide to try flashing patched_boot using SP flash tool and encounter the sign header error, then try the fix listed @ https://forum.hovatek.com/thread-439.html

Thank you for the hints. 
I using the boot.img as you recommend and patched it
Then I tried to flash it with the SP flash tool but run as you also expected in the Error 6045. So, I tried writing the image directly via advanced mode and Write Memory tab. This results in that the device showing:
Red mode 
The device has failed verification
Restarting in 5s
I was able to recover the device by flashing the original image. So is working again…
Any helpful ideas? My feeling is that without proper signing it will not work.


RE: Can this work? Idea for rooting Lenovo TB-7504X - X3non - 01-11-2019

(01-10-2019, 10:58 PM)Burns Wrote:  Thank you for the hints. 
I using the boot.img as you recommend and patched it
Then I tried to flash it with the SP flash tool but run as you also expected in the Error 6045. So, I tried writing the image directly via advanced mode and Write Memory tab. This results in that the device showing:
Red mode 
The device has failed verification
Restarting in 5s
I was able to recover the device by flashing the original image. So is working again…
Any helpful ideas? My feeling is that without proper signing it will not work.

what's the android version of the phone?
verify again that the bootloader isn't unlocked
zip and upload your boot.img to any cloud storage (e.g google drive) then post the download link here


RE: Can this work? Idea for rooting Lenovo TB-7504X - Burns - 01-11-2019

(01-11-2019, 09:32 AM)X3non Wrote:  what's the android version of the phone?
it is Android 7.0

(01-11-2019, 09:32 AM)X3non Wrote:  verify again that the bootloader isn't unlocked
yes the booloader is locked

fastboot flashing unlock
fastboot oem unlock
fastboot oem unlock-go

are not known to the device

(01-11-2019, 09:32 AM)X3non Wrote: [ Login / Register to download free]


RE: Can this work? Idea for rooting Lenovo TB-7504X - X3non - 01-12-2019

(01-11-2019, 10:51 AM)Burns Wrote:  ...

try this patched boot @ https://www.datafilehost.com/d/16eb96c1
lets know if you're still able to boot into homescreen after flashing


RE: Can this work? Idea for rooting Lenovo TB-7504X - Burns - 01-12-2019

(01-12-2019, 09:55 AM)X3non Wrote:  try this patched boot @ https://www.datafilehost.com/d/16eb96c1
lets know if you're still able to boot into homescreen after flashing

Unfortunately, I got the same result using the 'Ctrl + Alt + V'  -> “Write memory” Method
[Image: attachment.php?aid=6014]

I noticed one interesting thing. When reverting back to the original boot image I also used the 'Ctrl + Alt + V'  -> “Write memory” Method. In this case I ended up in a boot loop without the above message only the Lenovo logo was on the screen. Flashing the original boot image via “Download” had recovered the device.


RE: Can this work? Idea for rooting Lenovo TB-7504X - hovatek - 01-12-2019

(01-12-2019, 11:10 AM)Burns Wrote:  I noticed one interesting thing. When reverting back to the original boot image I also used the 'Ctrl + Alt + V'  -> “Write memory” Method. In this case I ended up in a boot loop without the above message only the Lenovo logo was on the screen. Flashing the original boot image via “Download” had recovered the device.

After flashing the stock boot using sp flash tool (and unbricking), try flash the stock boot-sign.img using Advanced mode and let me know what happens


RE: Can this work? Idea for rooting Lenovo TB-7504X - Burns - 01-12-2019

(01-12-2019, 07:46 PM)hovatek Wrote:  After flashing the stock boot using sp flash tool (and unbricking), try flash the stock boot-sign.img using Advanced mode and let me know what happens
The tablet was starting normal than I flashed the stock boot-sign.img using advanced mode: Same bootloop without the message just the logo.

I used this settings:
[Image: attachment.php?aid=6016]

[Image: attachment.php?aid=6015]