Hello,
I have device based on Allwinner A20, google play listed it as "BBA22".
Device have root access. This device does not have power button, so I installed "holo reboot" app - https://play.google.com/store/apps/details?id=com.scartech.holoreboot - it works ok with items "reboot" and "power off". Once I tried "reboot bootloader" item... Device rebooted and hang on displaying android logo. On normal boot android logo displays few seconds and booting continues. But now it display android logo forever. ((
I found small hole on device side and micro button inside it. I pressed this button and attached power cord. Device show progess bar, which completes in few minutes. (I guess it restore factory defaults, or so). But it does not help - it still hang on logo.
Also, device have only "regular" usb ports like on PC, and not have mini/micro usb ports to connect it to PC, so I don't know how to connect it to PC.
UPD: I found same device in this thread - http://forum.xda-developers.com/general/help/flash-a20-tv-box-t2876956 - photos show the board, micro button between usb ports.
Any ideas?
Solved, I attached serial-to-usb adapter to main board and got terminal i/o, pressed Ctrl-C to enter into loader menu, and issue "reset" command. Then tv box boot normally.
Related
See this thread
dont you hate typing the same answer every couple days?
this was much needed over-kill!
jmtheiss said:
"Just get into download mode and..."
Ever find yourself with a phone that's misbehaving, and you can't seem to figure out how to get it to download mode?
Here's a list of things to try (many thanks AdamOutler and Pirateghost), sorted in a "where are you now" setup:
FROM A POWERED-DOWN STATE - BATTERY REMOVED
- Insert battery, then press and hold Vol+ and Vol-, then insert your USB cable.
- Press and hold Vol+/Vol-, Insert Battery, Insert USB cable
- Press and hold Vol+/Vol-, Insert USB cable, Insert Battery
- Use a 301Kohm jig between USB pins 4-5 (can be manufactured jig or homemade chain of resistors)
FROM A BATTERY CHARGING STATE
- With USB cable inserted into Android device, press and hold Vol+/Vol-, then press Power
- (Advanced Method) Use UART, and during battery charging, type "reboot download"
FROM CLOCKWORKMOD RECOVERY MENU
- Position the cursor (highlighted selection) on "Restart device", Plug in USB cable, press and hold Vol-, then hold Vol+, then press power
- (Where available) Use the "Reboot Download" option in the "Advanced" menu
FROM A FULLY BOOTED PHONE STATE, WITH USB DEBUGGING ENABLED
Note: you may need to have ADB installed on your computer, and/or an Android Terminal Emulator installed on your Android device.
- Connect your Android device to your computer, navigate to your ADB directory, and type "adb reboot download"
- (Where available) Use the rom's power menu option to reboot into download
- From a terminal, type "su", then "reboot download"
- Download the app "quickboot", follow the app directions to reach download mode.
ADVANCED METHODS - REQUIRE HARDWARE MODIFICATIONS OR MORE IN-DEPTH TECHNIQUES
I'm presenting these largely unedited, as I don't want to incorrectly type an important detail of something that I don't understand myself.
- Apply UnBrickable mod to your device, then remove the battery, insert the battery, and click the "Download Mode" button on the computer
- Use UART (619Kohm resistor between USB pins 4-5, D+=RX, D-=TX, 192500bps 8n1 comms), press and hold ENTER while booting, then type USB
One additional thing - your download mode screen should, normally, look like the yellow triangle with the Android guy digging. However, if a flash goes foul somehow, you may be left with the infamous "phone--/!\--PC" screen. If you see this, don't panic. Although it's not technically the download mode screen, many users (including myself) have been able to successfully flash from that screen. Give it a try.
Oh, and thanks mrhaley30705 for suggesting this thread.
Click to expand...
Click to collapse
No problem. I'm just glad you had time to do it.
Thank you! I have been trying for MONTHS to get this mofo into download mode!!
Maybe a mod can sticky this and save some extra posts. Wishful thinking possibly.
Sent from my SAMSUNG-SGH-I897 using XDA App
Recommended to be stickied to a mod.
Stickied and added to roll up
Stickied and added to the sticky roll up but I have one question - aren't there differences between getting into download mode between Froyo vs. Gingerbread? Wouldn't that be worthwhile highlighting - or not, just wondering
Only for I9000 bootloaders.
And with those its super easy, no USB chord needed, just volume down and power that's it.
Ok, unstuck and now closing this thread.
Hi,
so if you have seen of a thread directly relevant to this please post the link...
My HTC Desire is bricked to the point it won't even display anything on the screen.
I have had Cyanogen7 installed for over a month. It was working OK, then I power cycled it. It did not boot fully, restarting at the swirly arrow cyanogen screen. Next, I entered boot loader, and exited that when I removed the battery. I then required HOME and MENU buttons to be pressed in addition to VOL DOWN + POWER in order to enter boot loader.
It took 35 seconds to leave the initial splash screen.
It took an extra 10 seconds for the OS to hit the point where it restarted, and it stayed constantly restarting the swirly arrow cyanogen screen every 10 seconds.
And now the piece-de-resistance – I installed the Android SDK, hoping to run fastboot to at least recover my data. After SDK installed I connected the Desire to my PC, and now it won't even turn on. Before the SDK USB drivers were installed it would enter HBOOT. Now, absolutely nothing. Not even a splash screen. Tried all button presses when turning on, removing SD and SIM, left battery out for 1 min, still nothing.
After following the instructions here:
wiki.cyanogenmod.com/wiki/Howto:_Install_the_Android_SDK
I installed the generic USB divers, and power cycled my PC. Left the USB cable connected for 10 min in-case the battery had run down (battery sitting at 3.2V). Still no joy.
This is the worst value paperweight I have ever bought.
Any advice on how to recover this would be great.
-WT.
Suspected problem: Bootloop
It all started when I connect my phone (Garmin-Asus A10 (v5.0.82 (updated with GarminAsusPhoneUpdater_Telenor_v2.0.3.exe of denmark))) on laptop through USB cable, the USB slot looks slightly damaged already upon looking at it, after connecting the expected to be happen is that the back-light will turn on, but what happen is that the phone has no response from it, I try to press the power button still no response, I removed the battery and bring it back and try to turn on again the logo appears (without vibrate which is supposed to be present in turning on my phone) then disappear after 7-10 secs.
It's already stock on the logo as I turn it on, the moment I pressed the power button the logo appears for about 7-10 secs then it disappear, also when I removed the battery and put it back the logo appears without pressing anything and disappear again after 7-10 secs.
I try to wipe the data through Volume Up + Volume Down + Power Button the ** WIPE USERDATA ** appears but then after a few secs it disappear again which is supposed to last for about a minutes.
And also I still can go to the **USB POLLING MODE ** through Volume Up + Power Button but seems like there is nothing to do with that thing.
I know it will be easy to fix this with the use of Garmin-Asus phone updater but it requires the phone storage which is so impossible to access at this point.
Hope you guys can help me with this, I badly need that phone.
----
Updates:
I can already open the phone and go to the home screen and menus... etc., but only when I close/cover the 1st metal/copper of the battery (back view (- to +))., but then I get an error saying that "The installed battery is not compatible with this device"
Upon doing this the phone is keep on rebooting, even if I already turn it off it keeps on turning on by itself, also I can't use any network at this point.
I already formatted the phone using master clear & **WIPE USERDATE** (Volume up + power button) still got the same problem.
And also updated with 006-B1243-00.update (The last .update file I used to update my phone (V5.0.82 DN)), upon rebooting after verifying the .update file it just blink twice then the update stops already at that point.
Updates 2:
Physically there is nothing wrong with the phone, I can still use the phone but as I mention already "only when I close/cover the 1st metal/copper of the battery (back view (- to +))." everything works fine except for the error "The installed battery is not compatible with this device" the red with "X" battery (Screenshot-1434948958913)
Also I notice something from my storage the "System Volume Information" (Screenshot-1434949331146, Screenshot-1434949336619, & Screenshot-1434949345666), I'm pretty sure that I haven't seen yet that before, I deleted the folder still it comes back.
Also once I connected my garmin phone to my computer the USB connected thing (Screenshot-1434949876071) don't disappear just until I restarted the phone.
Thanks in Advance.
Hi all
I have an huawei g6-u10 from my friend, he told me that was at school the phone was powered off (by him); when he returned from school, he tryed to power on the phone but it wont start.
Now i have it in my hands and i can confirm it
the phone seems on, if i press once power button green led appear (for a sec)
but the screen is black, completly dead
if i try to push vol down and power off for 15sec it vibs twice and then nothing, again screen black, anything
if i connect the phone to the pc it start automatically Media Partners, so i cant have access to sd card or internal memory
if i digit "adb devices" from c:/adb there are two blank lines and no phone show up
if i go to the device manager in windows, when i connect the phone to the pc it shows two partition with "portable devices" label, named F: and G:
How i can fix it?
Thanks to all
regards
Hi
I had this tablet for about two years, ran amazon Fire toolbox on it and everything was fine.
Couple of days ago it turned off, I think the battery level was around 15%. I was not able to turn it back on.
I decided to charge it overnight. Next morning I tried to turn it on but it stuck on Amazon logo.
I tried to do Power + Volume and was able to see the menu, attempted to do restart, then factory reset - and had this bunch of errors. Then I did the power down from the menu, and after that it doesn't turn on even to recovery any more, the screen is black, no logo, no backlight.
When I connect it to computer (the same I ran amazon fire toolbox on) there is an unknown device, but that's it, adb and fastboot don't see any devices.
Update: another windows machine recognized it as a Mediatek USB port and was able to install drivers.
When connected, it appears to be in a loop - Mediatek USB port device appears and in several seconds dissappears, in cycle.
Any help will be highly appreciated!
Thank you!
undersky said:
Hi
I had this tablet for about two years, ran amazon Fire toolbox on it and everything was fine.
Couple of days ago it turned off, I think the battery level was around 15%. I was not able to turn it back on.
I decided to charge it overnight. Next morning I tried to turn it on but it stuck on Amazon logo.
I tried to do Power + Volume and was able to see the menu, attempted to do restart, then factory reset - and had this bunch of errors. Then I did the power down from the menu, and after that it doesn't turn on even to recovery any more, the screen is black, no logo, no backlight.
When I connect it to computer (the same I ran amazon fire toolbox on) there is an unknown device, but that's it, adb and fastboot don't see any devices.
Update: another windows machine recognized it as a Mediatek USB port and was able to install drivers.
When connected, it appears to be in a loop - Mediatek USB port device appears and in several seconds dissappears, in cycle.
Any help will be highly appreciated!
Thank you!
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Click to collapse
Your eMMC probably died (notice the input-output errors), try to use amonet. If the script reports "read error" then nothing can be done.