Hi All,
I am trying to un-brick an Android DVR from Chinese manufacturer. Currently, it is stuck in boot and shows "Android is Upgrading. Optimizing App 1 of 1" on the screen. Can't get into recovery mode to clean cache or factory reset using reset button.
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View attachment 4957253
I tried to use adb to wipe the data but get permission error.
Last thing that appears to work is unlock bootloader from fastboot using the following commands:
Code:
su
adb reboot bootloader
fastboot devices
fastboot oem unlock
View attachment 4957257
The DVR is asking to press volume keys to accept the adb command and unlock the bootloader. However, there is no volume key in the device. I have just two keys, one power and one reset.
Can someone advice how to simulate volume key press to unlock the bootloader. Note that I am not able to get into the device at all due to "android is upgrading" error.
Related
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Here is what the Shield TV stock recovery looks like. To access it press ALT+PRINT SCREEN+i on any USB keyboard until your console reboots, then press the same keys again as soon as the Nvidia logo appears. You should see a broken Bugdroid with a "no command" message. Simply hold the tactile power button for a few seconds, until the screen pictured above appears.
To navigate touch the power button and to validate your choice hold it down.
Personally, I find the fastboot root method a bit complicated. Wouldn't be better to just use this stock recovery to flash a rooted stock image via adb ?
If anyone is willing to try, please report your success here.
Fastboot is required because you can't flash the ROM without unlocking the bootloader first. Flashing from stock recovery would require a script, which AFAIK has to go in /cache which isn't writable until the system is rooted.
So if you put the full android 5.1 on and want to go back to stock Android TV, would selecting wipe data/factory reset revert back to stock Android TV?
No, you would also have to flash the stock /system image and possibly /boot.
Sent from my LG-H811 using Tapatalk
I did a factory reset on m friend's nexus 7. I can access bootloader before because I flashed a factory image of Lollipop 5.1(4.4.4 before) then relocked it. But my friend decided to sell it and wants to erase everything in it so I factory resetted it in settings. But its already two hours and its still on erassing. I pressed vol up and power while on that screen and it is stuck on formatting data. I tried holding power button to power it off but instead it goes back to "google" logo then erasing screen. I tried powering down again by holding 10sec and after it goes black I immediately released power button and quickly pressed and hold it again together with vol down to access fastboot mode but it goes to google then erasing again. Anyone has a solution? My friend will surely get mad on me and it is already out of warranty. I never happened with my Nexus 5 before
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Have to you tried WUGS toolkit does it get reconised as a device?
Tried WUGS but it doesn't detect it
hope someone can help me
I dont root it, I Just bought new le pro3 ai (X651). after locare 2 installation, I just put my sim card in it but it had flashed the display several continuously so I decided to factory reset. After get recovery mode, I couldnt see the wipe exist data or update Ui that it just stayed with leeco logo and RECOVERY. Is it a brick and dont fix it? Volumn up+power to recovery mode and volumn down + power button for fastboot mode is possilbe. but when I just pressing power button, as I said above Leeco logo and recovery have been shown on the display and nothing happend. Plz help.
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I have fixed it by myself.
Using Fastboot mode and typed by "fastboot continue". Luckily I could get in the recovery mode so it could be wiped out and rebooted as factory reset. Now I am using it without a problem.
s1u2n3 said:
Using Fastboot mode and typed by "fastboot continue". Luckily I could get in the recovery mode so it could be wiped out and rebooted as factory reset. Now I am using it without a problem.
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Great!
And thanks for the info.
Dear friends,
I'm having and issue with my Bosion HU. I can't tell what model/type it is exactly. Please take a look on the photos.
From some time I was struggling with not working left knob (potentiometer only - pressing the button was working fine).
After much effort - replacing whole PCB board with that knob, through installing updates - nothing worked.
Today I wanted to do hard reset from recovery mode, but surprise was waiting for me... I was trying some combinations of power button and RST button to enter recovery mode and it came into bootloop...
Can you help find a way to manually enter recovery mode with this unit ?
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BUMP, please
I managed to get into recovery mode through Terminal Emulator by typing: reboot recovery.
But i have another problem - i cannot navigate in recovery mode at all. I have tried all buttons, all screen places and plugged USB keyboards but none of them was working.
BUMP, Still needs help! :C
Hello everyone. I have my asus zenfone max pro m1 and I want to install a custom rom in it, which requires me to go to fastboot.
I have followed a post on xda forum about it.
I have unlocked my bootloader.
installed adb and fastboot (platform tools).
enabled usb debugging and allowed my pc.
Now when give the command for adb devices, it shows me the attached device. Then i give the command "adb reboot bootloader" and it works perfectly and I enter fastboot on my device.
But as soon I give command fastboot devices the fastboot menu in my phone changes to small font saying "press power button to shutdown" . But when I restart my PC and do it all again, the first time when I
give the command for fastboot devices it shows me my device , but second time onwards it shows "??????? fastboot" and again the same small font message is shown. I have attached screenshot of my CMD for better illustration. Please help me regarding this . Thank you.
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