Develop Bugs

[Q] [ACRO S] Black screen, no respoding after instaling kernell.

Hi all
My phone is not responding, after unpuging USB cable when i instaled kernell from this pack: http://forum.xda-developers.com/showthread.php?t=2411343
1. I unlocked bootloder using fastboot and this go fine.
2. After that i use flashtool to instal kernel, and this also go well but after i instal kerlle the usb cable was unplug and then i got this black screen.
Now i got black screen on power on. The power button dosnt work normally.
Phone is not recognized in PC or Flashtool.
Only two combinations of keys work:
Pwr + vol + = reset of the phone, after reset it is a short time when Sony logo came up, and purple led flesh once.
Pwr and vol up and down = phone is shutdown
Is this some wat to rescu this phone? Or i got one, nice looking brick?
P.s. Sorry for my english.

elcidx said:
Hi all
My phone is not responding, after unpuging USB cable when i instaled kernell from this pack: http://forum.xda-developers.com/showthread.php?t=2411343
1. I unlocked bootloder using fastboot and this go fine.
2. After that i use flashtool to instal kernel, and this also go well but after i instal kerlle the usb cable was unplug and then i got this black screen.
Now i got black screen on power on. The power button dosnt work normally.
Phone is not recognized in PC or Flashtool.
Only two combinations of keys work:
Pwr + vol + = reset of the phone, after reset it is a short time when Sony logo came up, and purple led flesh once.
Pwr and vol up and down = phone is shutdown
Is this some wat to rescu this phone? Or i got one, nice looking brick?
P.s. Sorry for my english.
Click to expand...
Click to collapse
you need to install the rom ... not only the kernel ... once the purple led comes press the volume up key , it'll take you to the recovery . Do a factory reset and then install the rom ..

[Q] (HELP) Cant Enter Download mode

I have a plan to re-flash my LGOGP E988 stock kitkat not rooted and i already downloaded the files i need but when i try to enter download mode based on what i read in all thread regarding to my unit (vol+ & vol - + usb plug into computer), thers no luck for me.. It always go to charging and not in download mode. I already installed required driversCan you help me?
Combination i tried that was no luck(usb plug in computer);
1. Off phone>remove battery>hold both volume>reinsert battery>plug micro usb
2. Off phone>hold both vol.>plug micro usb
3. Off phone>hold +vol >plug micro usb(vice versa, also use -vol)
4. Off phone> hold both vol. >Power button (go to hard reset)
5. Remove battery> hold both vol.>insert micro usb
Please help me i will update things that i already try.
Thanks in advance..
And i know thia will be benefit other members that getting hard times to enter download mode.

robtoman said:
I have a plan to re-flash my LGOGP E988 stock kitkat not rooted and i already downloaded the files i need but when i try to enter download mode based on what i read in all thread regarding to my unit (vol+ & vol - + usb plug into computer), thers no luck for me.. It always go to charging and not in download mode. Can you help me?
Combination i tried that was no luck;
1. Off phone-remove battery-hold both volume-reinsert battery-plug usb to computer
2. Off phone- hold both vol.-plug usb to computer
3. off phone- hold +vol -plug usb tomputer (vice versa alao use -vol)
4. Off phone- hold both vol. Power button (go to hard reset)
Please help me i will update things that i already try?thanks in advance..
Click to expand...
Click to collapse
Skip the reinsert battery part in your item #1:
1) Remove battery
2) Hold Volume plus and minus keys down
3) Insert USB cable while still continuing to hold down those two buttons.
WIthin 1-2 seconds you should have download mode. When download mode appears, then re-insert battery. For sure you're not going into charging mode with no battery to charge. This is the method I always use, and it always works (aside from hard-brick situations, but you can access battery charging mode/graphics, which surely means that ain't you).

not works.
culot said:
Skip the reinsert battery part in your item #1:
1) Remove battery
2) Hold Volume plus and minus keys down
3) Insert USB cable while still continuing to hold down those two buttons.
WIthin 1-2 seconds you should have download mode. When download mode appears, then re-insert battery. For sure you're not going into charging mode with no battery to charge. This is the method I always use, and it always works (aside from hard-brick situations, but you can access battery charging mode/graphics, which surely means that ain't you).
Click to expand...
Click to collapse
I realy appreciate your help but i try it several time but still not enter download mode. Just always show the boot logo of LG then off then show again the boot logo. Why am i getting this? Can anyone has their own solutions?

robtoman said:
I realy appreciate your help but i try it several time but still not enter download mode. Just always show the boot logo of LG then off then show again the boot logo. Why am i getting this? Can anyone has their own solutions?
Click to expand...
Click to collapse
What does your computer say when you plug it in? If in Windows check Device Manager and see what your phone is being recognized as. Can you access the phone's contents via USB cable from your computer? Does ADB recognize it at all? Or does it just loop like that, not starting?
Also, it sometimes takes several tries to get it into download mode, as if you're holding the buttons down and not timed just right, the phone ignore your attempt. Make sure you do not let go of both volume buttons even after you plug in the USB cable, you must continue to hold them down for a couple of seconds (until the DL mode appears). Don't even think about putting the battery back in until you see that download mode box. Try that a few times maybe? If it doesn';t work ,maybe you're boned.

robtoman said:
I realy appreciate your help but i try it several time but still not enter download mode. Just always show the boot logo of LG then off then show again the boot logo. Why am i getting this? Can anyone has their own solutions?
Click to expand...
Click to collapse
remove battery and place it again. then press both volume+ and Volume - . By keeping pressed both buttons insert your usb cable. don't release pressed buttons until its in download mood. by the way install unified adb driver for android by koush if your using windows 8.1 otherwise lg official driver is ok

Galaxy Tab S SM-800 stuck with flashing TWRP logo

I was provided this device to try and help resolve the issue. I am not sure how it got to this point. I believe that it was rooted with a custom ROM, then the individual tried to install a stock ROM (method unknown).
The current situation is:
Galaxy Tab S 10.5 SM-T800 stuck in a bootloop with the TWRP logo on the screen. I can not get the tablet to go into download mode. I have tried all of the different methods to enter download mode, i.e. Power & Vol - & Home, Drain the battery > Plug into PC while holding Vol - & Home, Power & Vol + & Vol -. None of these combinations do anything. The only thing I can do to get a response is to press Power & Vol +, which reboots the device right back into the TWRP loop after the Samsung Logo. Power button alone does nothing.
The device is seen by Windows with the Samsung Drivers but is not mounted to a drive letter, and I can not mount it.
ADB , fastboot and Odin do not see the device.
I would like to flash a new rom either custom or stock, but I need to be able to get the device into download mode so it can be seen by odin.
Any help would be great.
Mike

Probably just timing and pilot error this one. I've never known of any Samsung device boot but be incapable of booting to download mode as download mode is bootloader related.
No working bootloader means dead device.
No matter what state the device is in at the moment with the usb cable removed, hold POWER + VOL DOWN (not up) + HOME until the Samsung boot logo comes up, hold for another couple of seconds then release. Download mode should appear.

I know it should be easy....
I know it should work but it is not, I will make a vid of the process and post. I can not make heads or tails.
Mike
ashyx said:
Probably just timing and pilot error this one. I've never known of any Samsung device boot but be incapable of booting to download mode as download mode is bootloader related.
No working bootloader means dead device.
No matter what state the device is in at the moment with the usb cable removed, hold POWER + VOL DOWN (not up) + HOME until the Samsung boot logo comes up, hold for another couple of seconds then release. Download mode should appear.
Click to expand...
Click to collapse

Is the home button actually working, are you pressing it firm enough?
If the home button doesn't register then the tablet will simply reboot.
Its a bit odd why twrp doesn't fully boot though unless it's the wrong one.
Does it hang at the twrp logo or continually reboot?

Samsung J2 not booting (No response at all) after suddenly shutting off automatically

Samsung J2 (J200G/DD) not booting (no logo, no vibrate), not into recovery (Vol+ + power + Home), not even into download mode (vol- + home + power), after it suddenly shutoff on it's own while in use (call). There was vibrate when it shut off (as normal shut down)
Battery checked, no problem. No response to charger input without battery. USB debugging probably not on
What can be done. Please guide.
Could not find any related problem/solution in forums.
Is there a possibility of hardware issue? Similar problem seen by any one, on this or on any other models? I have a similar problem on a Lenevo A6000, difference is that it goes into boot loop on connecting to charger without battery.

Hardware issue

aafaaque said:
Samsung J2 (J200G/DD) not booting (no logo, no vibrate), not into recovery (Vol+ + power + Home), not even into download mode (vol- + home + power), after it suddenly shutoff on it's own while in use (call). There was vibrate when it shut off (as normal shut down)
Battery checked, no problem. No response to charger input without battery. USB debugging probably not on .
Click to expand...
Click to collapse
Hi
i have the same issue on my Samsung galaxy SM-J200H right now! it is happened after flashing Stock Android LP 5.1.1 with Odin.
Do you fixed Your phone?
Edit: no way The device dead! i am changed the motherboard.
this problem happening when we flash the wrong security code of the ROM.
you will tell me i am flashed my Device ROM
Yes i am agree with you but some ROMs will not matching with all phones.
at the end of the ROM name have ex. U1 , B1 or U2 , B2 we should make sure which one is for our devices type.

S20 ultra cannot enter download / bootloader mode

Hi folks
Anyone seen this issue before (see pic) ?
When I try to enter download / bootloader mode I get stuck on red text 'entering fastboot mode... ".
Odin cannot detect the phone connected to PC
The only way out is to press and hold power and volume down for 5 seconds to reboot normally
Tried factory reset and also tried clear data & clear cache partitions in recovery mode.
FYI I'm on O2 UK branded July 2020 stock firmware

With this steps the problem will be solved:
Power Off
Insert cable on pc
Press Vol Up + Vol Down
Insert cable on phone without releasing the buttons

But I agree, the 'old' method does not work anymore, I am getting the same message as the OP.

M1LL3R said:
With this steps the problem will be solved:
Power Off
Insert cable on pc
Press Vol Up + Vol Down
Insert cable on phone without releasing the buttons
Click to expand...
Click to collapse
Amazing worked first time ! Thanks
Is this a very recent change by Samsung? I ran various Google searches but could not find any relevant article on the web or on xda forums