Hi everyone, I just received my Teclast M30 (10-inch tablet), version M5P3. I tried flashing a custom ROM but - surprise - I'm stuck on a bootloop.
The stock ROM was an Android 8 version. It is not rooted.
- I went into the developer options and allowed Bootloader unlocking via the corresponding option.
- Then via fastboot, I unlocked the Bootloader via (without any error):
Code:
fastboot flashing unlock
- Flashed TWRP, found on the only Teclast M30 thread... (=> https://forum.xda-developers.com/showpost.php?p=81064235&postcount=56) via fastboot (without any error):
Code:
fastboot flash recovery twrp-3.3.1-teclast-m30-20191201.img
- Flashed a GSI (ARM64 A-only) ROM (without any error). I used the "Android 9 - Havoc-OS v2.9" ROM on this link => https://github.com/phhusson/treble_experimentations/wiki/Teclast-m30-(MT6797x-helio-x27))
Code:
fastboot flash system Havoc-OS-v2.9-20190914-phhgsi_arm64_a-Official.img
I realized after a few hours that the TWRP I used was for the M4P7 version and mine is M5P3.. so I now know what I did wrong but even with this info, it doesn't help for my problem.
When trying to boot after flashing, I'm stuck on a bootloop.
It shows the Teclast Logo with some text saying it's in Orange State (= show a message saying the is bootloader unlocked) and then go to a screen with an Android Logo and a message saying: "No Command".
This "No command" screen is well known in our forum BUT problem is this screen stays only for about 3 seconds, and then the screen become black for 1 sec, then the "No Command" screen appears again for 3 sec, then it disappears again, endlessly. Here is a video of what's going on https://www.youtube.com/watch?v=O1iiu6MtOyM
Pressing "Power & Vol+" or "Power Button & Vol-" on this screen does nothing, I just can't enter fastboot mode as it keep looping and do not stay on the "No Command" screen.
When the tablet is completely shut down, I tried powering it up pressing just the "Power" button, but also "Power & Vol+", "Power Button & Vol-" but it does the same thing every time. It also acts identical whether the tablet is plugged in to the computer or just charging on the wall plug.
There is a "Reset" button on the tablet (must use a SIM pin to press it) but it seems useless to reset the device. When pressing it, it only shut down the tablet and stops the loop. I tried pressing it for long periods like 10-20-30 seconds in different situations but it just shut down the device and do nothing.
Does anyone have any leads on what I can do to revert back to original state or even just access fastboot mode ?
Thanks
I have the factory firmware file for my tablet (the good version this time..) now, but still the same problem of looping...
For future reference:
I fixed it thanks to the stock firmware and a tool (SP Flash Tool) that are both included in a file package provided by the constructor (at the time I created this post, this file didn't exist on their website. Now it does ).
This file is hosted on Baidu (only accessible with an account, and you need a Chinese phone number to create one) so I uploaded it on Mega if anyone need it:
https://mega.nz/file/3wAQDIrA#44HoXZxLt19mPo1XbzRbMPSCuZ9kZKIRWTWPvUJJhdY
Bye!
Related
**The problem as it stands**
My Galaxy S6 Active is stuck in a sort of bootloop, except it never seems to attempt a boot. If it was turning on, without any combination of keys, it would go to the "No Command" screen. From there all I can do is force reset (power + volume down) to get it to restart to the same place or as it displays the Samsung splash screen, press volume up + power + home, it goes to the download screen. From the download screen, I can use my pc to flash a rom (that may not be correct) to the device and according to Odin, that is a success but my device freezes on "erasing".
Imgur album with pictures of the accessible screens (http://imgur.com/a/Rd9ND)
**Description of the problem when it was booting**
At seemingly random times, the device would freeze and the only way to get it to do anything was to reset it. Sometimes it would enter a bootloop but through key combinations, I would be able to get it out. One time after a bootloop, I had the sense to back up the device's storage, so luckily I have that.
**What I've done**
- I have tried wiping the storage in device recovery -- when it was accessible, I can no longer get to it.
- I have tried using Kies/Smart Switch emergency software recovery -- but when provided with the model name and serial number they would both crash.
- When the device booted, I tried using the standard recovery feature in Smart Switch. I can't remember the exact message but it was something along the lines of "This device does not support initializing"
- I have tried using Odin to flash ROMs (again, I may be using this incorrectly) to the device. I have only tried Samsung release ROMs, meaning ones that have not been modified by a 3rd party. I followed the second and third methods of a guide on XDA forums (https://forum.xda-developers.com/ga...e/downloading-flashing-att-galaxy-s6-t3260744). Odin never throws an error and it always says it was successful. During the device's initialization with this new ROM, it gets to 32% then goes to "Erasing". A few seconds later the animation freezes. I can leave the device here for hours but nothing happens. So I believe more than the animation is frozen.
- I tried using ADB recovery via the device's recovery mode (when it was accessible) but from what I can gather, Samsung uses a proprietary ADB interface that would not work with what I was trying to do (I was following method 3 of the previously mentioned guide (https://forum.xda-developers.com/ga...e/downloading-flashing-att-galaxy-s6-t3260744). I would always get a message saying "ADB server out of date".
I may have done more than that but that's what I can recall.
Any help would be appreciated. Even if you know of a better place to post this, let me know.
Thanks
My s6 active did the same thing on 08/24/17. I have not yet found a solution.
Afternoon
I have a Lenovo 7" tablet which is sticking on boot...to describe:
tablet off, charge screen working fine (green battery)
can get into menu to select fastboot mode or recovery
fastboot works, at least screen appears!
recovery shows dead android/no command screen - how to access recovery?
booting up, get inital orange logo then a 'bing' and start of boot but then freezes on the second logo
tablet not visible on PC, even in fastboot mode (have installed drivers)
I'm looking to get this going but am a bit stumped. I tried reinstalling firmware but can't get SPF Tools to work with any available scatter files; I would like to install TWRP (I found a potential image file on XDA) but can't do this until the PC recognises it....and I'm going round in circles now....any suggestions gratefully received. :good:
Update
OK, post was maybe a bit premature - I've kinda fixed my issues.
Managed to get into recovery after watching many videos (most of which were wrong, but hey-ho, got me on the right path!). At dead android screen, press and hold in power + vol up + vol down together (there is a bit of knack, turn it on its side with buttons facing up seems to be easiest) - this fires up the recovery screen (android standard recovery).
I managed to get over my bootloop issue by performing a data wipe/factory reset and cache wipe, then restarted fine.
As this was a secondhand tablet (my usual purchases - good condition bootloops!) - once it booted up I got into the set-up screens only to discover a Google lock issue. I ran the FRP unlock from here: https://androidfilehost.com/?fid=11050483647474832839 using the instructions from here: http://forum.gsmhosting.com/vbb/f958/lenovo-tab-4-7-essential-tb4-7304f-frp-remove-2322527/ (Voltrans second post, not the original one which has a 404 error on the download site). This removed the FRP lock straight off and now I have a functioning tablet.
I'm probably going to try getting custom recovery on so will see how that goes - I'll post back
and...that's all folks....
OK, despite finding a TWRP recovery online https://twrpbuilder.github.io/downloads/twrp/#441 and downloading it, can I get the fastboot unlocked? no.
Apparently Lenovo locked them all up and threw away the key, so nothing more can be done here.
I tried various iterations of fastboot oem unlock and fastboot flashing unlock, and nothing works, just get an error - and yes, I did put developer options on, OEM unlocking ticked and USB debugging active.... :silly:
So, unless someone can point me in a direction on how to unlock it - I've reached the end of the road with this one
Hello
I have UmiDigi F1 Play stuck in a boot loop.
So, the phone was working fine on "UMIDIGI F1 Play V1.0_20190903 ROM - SPFT + OTA release" updated via OTA. One day after a normal restart the phone went into a boot loop (UmiDgi logo, <thinking>, black screen (displayed not turned off), <thinking>, UmiDigi logo, and so on).
So, these are the steps I took so far with no luck:
1. Managed to get into recovery (pressing repeatedly Vol-Up while UmiDigi logo comes on), and did factory settings restart, still boot loop. "Mount /system" still boot loop. "Wipe cache", still boot loop. Also at times when I got into recovery browsing through the options was super slow - one pres vol-up or vol-down and it took three seconds to move to the next option in the menu.
2. Reflashed in Download only mode the ROM "UMIDIGI F1 Play V1.0_20190903 ROM - SPFT + OTA release" via SP Tools, still boot loop.
3. Downgraded using Flash firmware mode to the oldest available ROM - "UMIDIGI F1 Play V1.0_20190409 ROM - SPFT release", still boot loop.
4. Formatted everything including bootloader, flashed again the newest "UMIDIGI F1 Play V1.0_20190903 ROM - SPFT + OTA release", restored IMEIs, still boot loop.
4. Occasionally the phone loaded the system, but after system restart there is still a boot loop. Moreover, in the top right corner there are two lines saying "TEE: <Chinese symbols> Google: <Chinese symbols>" visible at all times in Android, despite correct IMEIs being present.
5. Flashed again the newest "UMIDIGI F1 Play V1.0_20190903 ROM - SPFT + OTA release" but this time I've read somewhere to press and hold both vol-up and vol-down before connecting the phone to the computer to supposedly enter safe mode. It only resulted in displaying single green pixel in the top-left corner at all times in boot loop.
6. I've unlocked the bootloader via Developer options in Android when it miraculously loaded. Tried to flash TWRP via ADB - the phone displays that bootloader is locked. Tried flashing TWRP according to the instructions on the UmiDigi forum via SP Tools and there is a text under UmiDigi boot logo saying "Red state <you're using custom recovery use OEM recovery this will not start>". The text is displayed for a very short period of time and the phones goes again into a boot loop.
So to sup up:
- the phone has the newest stock ROM "UMIDIGI F1 Play V1.0_20190903 ROM - SPFT + OTA release"
- is stuck in boot loop (UmiDigi logo, <thinking>, black screen (displayed not turned off), <thinking>, UmiDigi logo, and so on)
- in the boot loop there is single green pixel in the top left corner at all times
- when the system occasionally loads there are two lines visible at all times saying "TEE: <Chinese symbols> Google: <Chinese symbols>"
How do I fix that guys? Any ideas?
SOLVED
So, I solved my bootloop issue.
The reason for bootloop was faulty fingerprint scanner. I've disassembled the phone, disconnected the FP scanner and phone boots as it should.
However, don't throw away FP scanner if you won't replace it. You will need it if you will want flash in the future anything via SP Tools - flashing without will result in bootloop.
so how did you get rid of the chinese red letters??
Edit: I managed. Thanks anyway!
I done goof'd when trying to flash custom recovery, now phone gives "secure booting error! Cause: boot certification verify" when trying to boot.
I'm unable Fastboot - all the tutorials I found give me wrong instructions (*more details at the end).
So I'm trying to flash stock rom, but every flashing software I tried either had a broken download link (LG's official site is hot garbage), Needs a password (seriously, why), or doesn't run on my perfectly fine, modern enough PC (Ryzen gen 2).
Any help? With either a normal Flashtool (please link), or a way to enter Fastboot?
*Volume+ power, release when logo appears, then holding down volume+power again brings me to factory rest. Not even recovery. Choosing "Yes" on factory reset does nothing.
*Powering off, then holding volume up while plugging in the USB brings me to download mode. Keeping the same butting still held does nothing.
*Powering off, then holding volume down while plugging in the USB does nothing (boots normally, then displays the booting error I mentioned earlier).
I have similar problem with LG G2 mini: Secure booting error: Boot certification verify. I tried turn on download mode but I can not turn on download mode. I tried t flash smartphone by flashing software LG flash tools but this program hangs. Exception code: c0000005. Can you help me?
I have a galaxy A7 2018 (SM-A750F) that I wanted to root. I flashed the specific TWRP recovery .tar file for my device using Odin, but I pressed the volume up + power key before the success message appeared on Odin. Now I'm stuck in a TWRP bootloop when the homepage of the TWRP mode flashes (basically just the logo and the version number) for a few seconds, then a black screen appears and the phone reboots back into the same mode when I press volume down and power keys. Eventually, the TWRP homepage screen flashes on and off and the logo appears to be distorted.
I tried accessing my phone using adb, but it shows that no devices are connected, and I made sure to enable USB debugging before the whole process. Could the usb port have been damaged because of the process? It was 100% functional.
My phone is also overheating, even when it is turned off.
My phone is also overheating, even when turned off, even when the screen is off
I don't really know what to do at this point. I even tried tapping on the black screen but no short vibrations occurred, so I guess the whole TWRP mode is corrupted. Any help would be best welcome!
Same issue and my phone's os is bricked so I can't even boot to the os / boot loader / download manager to flash stock files
LadyAmy said:
Same issue and my phone's os is bricked so I can't even boot to the os / boot loader / download manager to flash stock files
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