Develop Bugs

[Q] STUCK?

my Epic is stuck. I can get it into recovery and download mode, but i cannot get it to go back to regular due to none of the 4 buttons on the screen working so i cant press the home button to click "reboot system now". i also tried using odin and the pc will not recognize it. i used another epic and it showed a com port so it is not driver related. any idea on how to get this back to normal so i can get it replaced? or use it until a replacement comes

What?
I don't understand what you are trying to do with the home button. You should be using the real buttons on the sides if you can't boot android properly.

Isnt the enter button the home key?

No, the camera button is the enter key

ok... just tried the camera button... does nothing... any idea?

Either you're not doing it right or you're screwed. You're saying that your camera button doesn't function as an "enter key" for anything in recovery?

correct... it does not click anything tried to select each option and it does not respond to the camera key

Then you're stuck. If you can't odin and you can't select anything in the recovery, then you can't do much of anything.

try sliding up the keyboard and trying the enter key or the hard keys on there

[Q] Galaxy Tab 3 7.0 Won't go into recovery mode

I have in my possession a Galaxy Tab 3 7.0 inch, that will not go into recovery or download mode. When you hold the power and volume up button it starts regularly, despite the fact I have several other Galaxy Tab 3 7.0 inch tablets that do go into recovery. I cannot get it to go into download mode either, so I'm stuck as what to do. I have confirmed that the volume keys do indeed work, I can change the volume of music with them after the system has started.
My goal is to do a factory reset on the device, is there some trick I can do via USB to put it into recovery? Or maybe do a reset over USB?
Any help is greatly appreciated.

Yeah it can via adb shell and you know you should hkld home button top?
Brought to you by SM-T210R

concerning button combination to recovery/download modes
apparently the home key is not needed on p5210 at least, only power &vol+ =recovery
power & vol- = download mode
edit; tab 3 7.0 does need 3 button combo
check root by opening terminal and typing su
if return with [userid]# then you have root
type whoami , should return uid0 or command: not found , means no busybox
at root prompt # , type reboot, or reboot recovery
okay so [edit] my thought is your home button may be boned or sticky/dirty
a side question, i need to know commands for following if they exist
i need to know what the BOOTLOADER outputs by way of log if there is one
i need another way to get mmcblk names as the cat /proc/dev device by name
isn't present on my tab.
i do apologize for unrelated questions, but couldn't see starting new thread for that
i don't mind pm's so please feel free. thanks for reading
:good:

For download mode
Keep pressing
Power + volume down + home key until it vibrates
And for recovery
Power + volume up + home key until it vibrates
Sent from my SM-T211 using Tapatalk

MCorgano said:
My goal is to do a factory reset on the device, is there some trick I can do via USB to put it into recovery? Or maybe do a reset over USB?
Any help is greatly appreciated.
Click to expand...
Click to collapse
You can do a factory reset from The settings out.

http://forum.xda-developers.com/showthread.php?p=45941186
Brought to you by SM-T210R

same problem
i had the same problem but my tab also wont turn on . i cant even get to recovery mode or download mode. first thing i did before it happen is that i tried to reset it going to settings . then after that i didnt know what happened it wont turn on . please help ;(

Bricked Head Unit RK3188 - Please Help

I recently upgraded to the eonon GA6151 and was trying to flash update_RK3188_1024x600.img " booroondook RK3188" , well I renamed the file wrong to dupate.img instead of update.img I started flashing it and it was too late before I realized. Now the unit will not boot up or go to recovery. I can reset it and see the buttons flash like it wants to go to recovery but nothing ever appears on the screen. Is there a way to adb into this unit? Can I put files on a card and have it auto install them? Any help would be appreciated.

FIXED IT!!
I fixed it using this method. I realized after the fact that this new unit is MTCD not MTCB.
https://forum.xda-developers.com/showpost.php?p=67184851&postcount=50
I then had the error
https://forum.xda-developers.com/showpost.php?p=67309331&postcount=116
Which I fixed doing this
https://forum.xda-developers.com/showpost.php?p=67598154&postcount=319
I used the dupdate from here.
http://huifei.fs-fileserver.de/content/firmware/MTCD Custom ROMS - NOT FOR MTC-/RK3188/2017.02.21/
I loaded it onto the sdcard and the usb drive , the sdcard was created using upgrade disk tool and has to be 16gb or smaller fat 32. The usb drive just had a copy of the dupate.img file on the root of it.
To get into recovery on this unit do the below. http://www.eonon.com/Android-Car-GPS/Vehicle-Specific-GPS/GA6151.html
Press and Hold HOME AND POWER buttons
Press RESET while still holding HOME AND POWER
Let go of HOME AND POWER and then press HOME AND POWER down again and hold until the lights flash 3 times " is about 10 seconds to hold them "
Now Let Go of the HOME button then the POWER button the press the POWER button once "do not hold" and wait for it to boot into recovery.
This is the only method I found that reliably will get you into recovery. Make sure you use the GPS slot for any sd stuff you need to do in recovery.

Did you have to take the unit out of the car? I’ve made the bootable SD but nothing is happening.
Sent from my iPhone using Tapatalk

Hi
My unit is totally brick. It's like dead only when press reset button the lights flashes each time push but nothing happens i tried the above methods but can't enter to recovery mode nothing happen in the screen it's like off.
Please help

Rodrizio said:
Hi
My unit is totally brick. It's like dead only when press reset button the lights flashes each time push but nothing happens i tried the above methods but can't enter to recovery mode nothing happen in the screen it's like off.
Please help
Click to expand...
Click to collapse
From the posts and threads that relate to recovery, what options have you tried.

marchnz said:
From the posts and threads that relate to recovery, what options have you tried.
Click to expand...
Click to collapse
I tried push the buttons in the combination on the first post and tried too enter to flash the unit with a PC with the batch tool but can't achieve USB mode to flash My unit i don't know if need it Push something button and tried too create a boot sdcard with the tool but nothing. My unit it's like dead only when press reset button the lights flash each time

How to enter in recovery or Odin mode without power button (broken)

Hi everyone, I have an IMPOSSIBLE MISSION to propose!
I have an old T705 LTE tab with the broken motherboard, I found very little a wifi T701 model card sold for inoperative, it actually works or better has the POWER ON BUTTON broken, missing and it is impossible to replace because the part is was damaged !!
After so many research I managed to figure out how to turn it on (disconnecting and recharging the battery quickly !!!!)
It lights up and works and here begins the problem and the mission is impossible to unlock it and make the WIPE !!
The s tab is switched on with fingerprint or backup password !!
The English ebay user who sold the card did not know the password was actually amazed at how she managed to make it resuscitated.
What I would like to do is ENTER in RECOVERY or ODIN mode to format it, but how do I do without the power button?
I tried:
1) With ADB commands but the tab does not have active usb debugging and can not activate it because it does not enter the settings (tab with locked screen!)
2) Enter recovery or Odin mode, but also doing the task remove and put battery + vol on or vol down + home does not enter the desired mode, it normally starts. Most likely, you need the POWER key.
3) I tried with kies and Smart Switch but also tells you to reset it, now go into download mode with the vol keys down + power + home.
4) I tried turning it off to connect it to the pc hoping Odin recognized him (nothing)
5) I tried to short-circuit the power button area, but nothing to do.
No other ideas come to me !!
In a nutshell, is there an alternative way to unlock or format it without the cursed POWER ON button?
He loves the word for this impossible mission !!
Thank you and I hope to have some help from the community!

On the SM-T800, the power-button is a part of user-replaceable assembly, the one that includes also the volume buttons, the left speaker, and the headphone jack. I had to replace it because dropped the tablet and damaged the headphone jack.

A-Media Auto 1024x600 Sofia

Hello.
I bought a car and it came with an android head unit, but I don't know the model and didn't get a manual with it, from my understanding it's Joying or Erisin.
Are there any roms or mods for my unit?
What are the steps to install a reverse camera?
Does the unit have a fastboot option somewhere, now it takes 2 minutes to turn on every time I get in the car.
Thank you guys and sorry for my noob-nes.

Ok, I found out how to do most of the stuff on my unit, but the only problem I have now is that I can't go into recovery mode.
I tried holding the reset button for 20s and nothing happened, the screen went black and the touch screen buttons went dark and that's it.
If I hold the Power off button, the screen goes black but not the button lights.
I tried even combinations between then or the back button, but nothing.
Please help, if I can get to recovery mode I'll be the happiest man alive. ?

Three is a workaround based on using s USB keyboard.
Check if on the thread for Intel Sofia mtcd units
Enviado desde mi SM-G950F mediante Tapatalk

This solution? Is this the only way to acces recovery?
I updated the MCU to the last one and then I tried to install magisk rom through settings, it recognized the file and went into recovery but it failed. So I was into recovery but I couldn't access the menu. It says use volume buttons but that didn't work, tried all the other buttons and reset button and didn't work.
1. Disconnected all power from the unit... ACC & BAT disconnected
2. Prepared 12V power supply with on negative and two positive connectors
3. Connected negative to GND & one positive to BAT
4. Connected USB keyboard
5. Press right ALT (ALT GR on some keyboards) and PrintScreen
6. Connected the other positive lead to ACC (unit does not work if both BAT and ACC are not connected)
6a. Start pressing repeatedly on E (not holding E pressed, but press...release... press... release..... rapidly)
7. The boot logo shows (MarshMallow...etc) and after a few seconds the unit reboots itself
8. Release right CTRL & PrintScreen and continue to repeatedly press on E.
9. The Recovery shows on screen.