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[Q] Unbrick TF300T Without Unlocking Bootloader

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yourignhere
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Default [Q] Unbrick TF300T Without Unlocking Bootloader

I have a TF300T that I need to fix. It gets stuck in an infinite boot loop, and when I try to run the recovery kernel, it will not work. I'm trying to flash CWM or a new rom onto it to get it running again, but the bootloader is not unlocked. Is there any way that I can unbrick the tablet without needing to unlock the bootloader, or is there any way I can unlock the bootloader without running the apk file Asus gives? I can't get past the recovery menu.
 
Voidac
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(Last edited by Voidac; 5th July 2014 at 05:01 PM.)
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I have the same issue with a tf300t after attempting to update it. It's stuck on the boot screen with text in the top-left corner reading "signature match". Nothing happens, I've rebooted multiple times using multiple methods, but nothing works. I did manage to get my pc to recognize the tablet for a short while, but it didn't recognize the device.

Please, is there anything we can do besides getting a new tablet?

Edit: I tried adb and fastboot. No success. My tablet won't boot into the required state for these methods. Is there any other way to get it back to working order besides sending it to ASUS?
 
andrewnelson23
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So neither of you are able to get to the screen that has the three icons?

If you can get to that screen you should be able to do a cold reset. This is the wipe data option. In other words, you will lose all your data.

Also, you might be able to flash stock SKU if you can get to that screen.

Sent from my SM-N900T using XDA Free mobile app

---------- Post added at 05:40 PM ---------- Previous post was at 05:40 PM ----------

Quote:
Originally Posted by Voidac View Post
I have the same issue with a tf300t after attempting to update it. It's stuck on the boot screen with text in the top-left corner reading "signature match". Nothing happens, I've rebooted multiple times using multiple methods, but nothing works. I did manage to get my pc to recognize the tablet for a short while, but it didn't recognize the device.

Please, is there anything we can do besides getting a new tablet?

Edit: I tried adb and fastboot. No success. My tablet won't boot into the required state for these methods. Is there any other way to get it back to working order besides sending it to ASUS?
So you can't get to any screen on your tablet? What is your process? Which buttons are you holding?

Sent from my SM-N900T using XDA Free mobile app

---------- Post added at 05:42 PM ---------- Previous post was at 05:40 PM ----------

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Originally Posted by yourignhere View Post
I have a TF300T that I need to fix. It gets stuck in an infinite boot loop, and when I try to run the recovery kernel, it will not work. I'm trying to flash CWM or a new rom onto it to get it running again, but the bootloader is not unlocked. Is there any way that I can unbrick the tablet without needing to unlock the bootloader, or is there any way I can unlock the bootloader without running the apk file Asus gives? I can't get past the recovery menu.
If you can get to the recovery menu, try doing a cold reset. It will wipe all of your data. You click to move over to wipe data and select it. Then you should be able to boot and install that app to unlock your tablet.

Sent from my SM-N900T using XDA Free mobile app
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Voidac
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Well, I've used the power button & Vol Down in an attempt to cold boot it or to get to the other options. No luck even getting to that screen.
 
andrewnelson23
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Originally Posted by Voidac View Post
Well, I've used the power button & Vol Down in an attempt to cold boot it or to get to the other options. No luck even getting to that screen.
Is your tablet charged?

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Voidac
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Is your tablet charged?
I've tried from plugged, unplugged. Full battery and letting it sit for almost a day to completely drain the battery.
 
yourignhere
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Quote:
Originally Posted by andrewnelson23 View Post
So neither of you are able to get to the screen that has the three icons?

If you can get to that screen you should be able to do a cold reset. This is the wipe data option. In other words, you will lose all your data.

Also, you might be able to flash stock SKU if you can get to that screen.

Sent from my SM-N900T using XDA Free mobile app

---------- Post added at 05:40 PM ---------- Previous post was at 05:40 PM ----------



So you can't get to any screen on your tablet? What is your process? Which buttons are you holding?

Sent from my SM-N900T using XDA Free mobile app

---------- Post added at 05:42 PM ---------- Previous post was at 05:40 PM ----------



If you can get to the recovery menu, try doing a cold reset. It will wipe all of your data. You click to move over to wipe data and select it. Then you should be able to boot and install that app to unlock your tablet.

Sent from my SM-N900T using XDA Free mobile app
I was able to do a cold reset and the tablet's working fine now, just waiting on the wifi connection (which is taking abnormally long) to get going so I can unlock the bootloader.
 
andrewnelson23
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Originally Posted by Voidac View Post
I've tried from plugged, unplugged. Full battery and letting it sit for almost a day to completely drain the battery.
So does it just go black or what?

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---------- Post added at 04:44 AM ---------- Previous post was at 04:42 AM ----------

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Originally Posted by yourignhere View Post
I was able to do a cold reset and the tablet's working fine now, just waiting on the wifi connection (which is taking abnormally long) to get going so I can unlock the bootloader.
Did you get it going?

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yourignhere
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So does it just go black or what?

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---------- Post added at 04:44 AM ---------- Previous post was at 04:42 AM ----------



Did you get it going?

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It won't connect to wifi. It says "authenticating" and just stays there forever until I turn off the screen, then it says "not connected"
 
andrewnelson23
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It won't connect to wifi. It says "authenticating" and just stays there forever until I turn off the screen, then it says "not connected"
You can try to flash the original SKU and see if that fixes it?

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