Develop Bugs

[Q] Phone won't boot. Vibrates three times. Need advice.

My G2 won't boot normaly and is acting very straingly. I did a search of other similar problems people have had, but nothing matches what is happening to mine. It started when I noticed my power button and volume up button stoped working. I assumed it was a glitch and thought a reboot might help. Since the power button wasn't functioning, I pulled the battery to reboot it. That's when it stoped working. When I turn it on normaly with the power button, the screen stays off, it vibrates three times, and the led blinks orange untill I put the battery. If I attempt to boot into recovery with the button combination, it does the same. If I attempt to boot into HBoot, it vibrates five times and the led lights up solid green. Here's where things get realy strange. When I plug the phone into the charger while the phone is off, after about five seconds the phone comes on into the recovery bootloader even though when I boot while holding the buttons it dosn't work. I have the ClockworkMod touch recovery installed. From within the recovery I have full access to everything including ADB with root access. When I select the reboot option from recovery, it does the same thing with the vibrating and the blinking led. I tried the key test in the recovery and I discovered that my volume up button only works intermitently and my power button seems to be working fine. I haven't attempted to flash a new rom yet because I'm assuming it must be something else since I can't even access HBoot, and I'm scared if I touch anything I'll loose access to recovery and ADB as well.
Any advice? Could a damaged volume up button contact cause all this to happen? Should I try flashing it from recovery even though I can't access HBoot?

Thread moved to Q & A section, post in the relevant section next time.

in adb try
adb reboot-bootloader

demkantor said:
in adb try
adb reboot-bootloader
Click to expand...
Click to collapse
Just tried it. Screen goes black, vibrates three times, and led blinks orange untill I pull the battey. It was a good Idea though, I didn't think to try that myself.

you know what, are these very quick vibrates? you mentioned there is a problem with your volume rocker (sticky keys?) your phone may be trying to get into the jtag/download mode.
not sure how to use this mode on the vision but tell me if this is the same response you get.
take out battery, hold both volume buttons, plug phone into computer.
it should vibrate three times rapidly and computer should look for driver :
Qualcomm CDMA Technolgies MSM driver
not sure where to get the proper driver for the vision but ive used this mode to root other android phones and i know there is a "unbricking project" for various phones that use this mode.
nothing for the vision that i know of though.
but being you have adb access maybe test a few things first like see if anything is accessible from your emmc
type:
Code:
adb shell
dmesg | grep mmc0
and see what happens
edit:
i can replicate you situation by holding volume up while powering on
you have a stuck volume up key, almost 100% just open up phone and clean it out and you should be just fine!

[Q] How to get out of stock Android system recovery (power button won't select)

Okay here's the run down. I'm on JB and rooted, and was about to apply the new FreeGee bootloader unlock, when I wanted, out of sheer curiosity, to check to see if I could get into the stock recovery by holding powering off and then holding Vol Down + Power. Ever since I rooted it didn't seem to work anymore, but I didn't have a need to boot into since manually applying the JB update.
Anyway, neither Vol Down+Power of Vol Up+Power worked, the phone just booted normally. So, I decided to use ADB to boot into recovery using "adb reboot recovery". It worked, and the stock recovery loaded up. I can scroll up and down using the volume keys, but for some reason cannot select any option by pressing the power button. If I hold the power button down, the phone will appear to restart, but it boots right back into the stock Android system recovery, where again, I cannot simply select any choice with the power button. ADB doesn't list the device since I'm in recovery, and I only have fastboot installed on my lapton running XP which isn't available at the moment (I'm on OSX 10.6).
I'm thinking pulling the battery may work, but I don't have my torx screw driver handy. Anyone have any ideas? Perhaps where to get fastboot for OSX (it appears to still be missing from Android SDK). Thanks.
EDIT: SOLVED - Turns out in stock recovery, the soft menu button (the one on the bottom right) is used to make the selection, not the power button like in the custom recoveries. Still not sure why the Power+Vol. Down doesn't work to boot into the stock system recovery.

Use the menu button to select now.

what dm said. they wont be lit up but they still work

Yeah, I figured that out almost immediately after posting this (feel dumb now). Thanks though.
Any idea why the key combo Vol. Down + Power no longer works to boot into stock recovery? Seems odd that it worked before when manually updating to JB.

Hello. Can you tell me another solution. I have similar problem. Stuck in recovery mode with faulty power button, and can't get out of there. It's not working with menu button. Is there a way to do it with SD memory card? Thanks.

Device is stuck at HTC logo Screen after reboot with no ROM installed

I wiped my phone and tried rebooting it to recognize my microsd card after wiping the phone and putting the ROM I wanted on the microsd card.
Now it is stuck on the HTC logo white screen and I have tried adb commands and nothing works and I have tried the light trick on the front camera (like on the m7) and that didnt work. I have pressed the power + vol down for a while now and nothing is working. what should I do?
edit: Right after I posted this I pressed the vol up and down button with the power button and it worked... I dont get it. anyways thanks!

You must hold volume up + power to reboot and then volume down to enter bootloader.
Sent from my HTC One_M8 using xda app-developers app

Happened to me yesterday. I was trying to install a recovery and the recovery never installed properly. So when I tried to boot to recovery, it just showed the box with the the red triangle.
The phone wouldn't restart or anything. Pressing and holding the power didn't work. No adb either. I was afraid that I would have to wait for ~70% battery to drain. LoL!!
But holding power eventually worked like 5 minutes later. *whew*

hold volume up + power to reboot and then volume down to enter boot loader.

Can't enter fastboot mode Vol - Power

If I hold volume button down while pressing power, it does nothing. Just stays totally black. Held it for 1 min straight. Release the volume button and just hold power and it turns on fine, but can't enter fastboot mode. Have tried now 5 or 6 times. Any ideas?

I have the same issue....However I can enter fastboot via adb

Okay. Was able to do the same, but "adb fastboot recovery", but no option to update from SD. It automatically tried looking for "MOFD_UPDATE" when entering recovery. So I renamed the download from Asus to MOFD_UPDATE, but ran into other issues (CN build not allowing WW update).
Are you getting option to update from SD in recovery?

damian5000 said:
If I hold volume button down while pressing power, it does nothing. Just stays totally black. Held it for 1 min straight. Release the volume button and just hold power and it turns on fine, but can't enter fastboot mode. Have tried now 5 or 6 times. Any ideas?
Click to expand...
Click to collapse
It should be volume up + power. When the phone vibrates, release power but keep holding volume p.

Okay. I was following from here http://forum.xda-developers.com/zenfone2/general/guide-how-to-update-flash-asus-zenfone-t3084727
I tried volume up too, but found it needed to be released, at just the right moment, then re-pressed again. Otherwise it just powered-off again if holding straight until after the quick logo flash. I found I needed to release during the logo flash, wait a second, then repress and hold. I know, sounds strange, but I've reproduced it many times.
Anyways, OTA shows no update available, even though there's clearly an update to both CN and WW on Asus site. Trying to flash WW gives me build prop error because SKU is CN (but current ROM is WW). Strange situation. Haven't tried manually flashing latest CN yet.

Hye can help.my Asus zoovd can't enter to recovery mode and suck.but fastboot mode can enter. Have idea?

Hi bro did you find a solution to boot your phone into fastboot mode. I have the same issue and i need help

How to reliably start TWRP

I have TWRP installed, and have managed to run it a few times. Now I cannot start TWRP at all.
From off, if I switch on, the following happens:
1) Screen with Samsung Galaxy A70 - Secured by Knox
2) 0.5 seconds later another screen, "this phone's bootloader is unlocked and it software integrity. .." and "press power key to continue..."
3) 5 seconds later, same screen as (1)
4) 3 seconds later, red letters "this phone is not running Samsung's official software"
5) 3 seconds later blank screen with "samsung" and then booting to android.

In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it ) , for booting twrp on the other hand I turn off the phone first, then I press power button+volume down until the "this phones bootloader..." screen appears, here is the tricky part, you have to quickly let go of these two buttons, press power button, let go of the power button (after the warning disappeared) and then press volume down button (and hold it) until twrp logo appears, this happens really fast so you may need to do it a few times to get used to it.

mobin22 said:
In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it )
Click to expand...
Click to collapse
Yes, same here, the only time I have managed to run TWRP on this phone, is right after a flash.
mobin22 said:
and then press power down button
Click to expand...
Click to collapse
Do you mean volume down?

Zilliman said:
Yes, same here, the only time I have managed to run TWRP on this phone, is right after a flash.
Do you mean volume down?
Click to expand...
Click to collapse
Power off the device, plug into a pc, wait for it to start charge, hold vol up and power till it turns on. Wala boots to twrp. If you have magisk installed,you can use the reboot option within magisk.

mobin22 said:
In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it ) , for booting twrp on the other hand I turn off the phone first, then I press power button+volume down until the "this phones bootloader..." screen appears, here is the tricky part, you have to quickly let go of these two buttons, press power button, let go of the power button (after the warning disappeared) and then press volume down button (and hold it) until twrp logo appears, this happens really fast so you may need to do it a few times to get used to it.
Click to expand...
Click to collapse
Samsung changed how to enter recovery on Android 11. Power off device, plug into pc, wait for it to charge, then hold vol up and power till it turns on. Alternatively, if you have magisk installed, use the reboot options within magisk.

I did that. Thanks!
But it has gone to:
Android Recovery
Samsung /a70qxx/a70q
11/RP1A.200720.012./A705FNXXUB5DVB3
user/release-keys
Use volume up/down and power.
Reboot system now
Reboot to bootloader
Apply update from ADB
Apply update from SD card
Wipe date/factory reset
...
...
...
Where is TWRP? It seems it's gone.

Zilliman said:
I did that. Thanks!
But it has gone to:
Android Recovery
Samsung /a70qxx/a70q
11/RP1A.200720.012./A705FNXXUB5DVB3
user/release-keys
Use volume up/down and power.
Reboot system now
Reboot to bootloader
Apply update from ADB
Apply update from SD card
Wipe date/factory reset
...
...
...
Where is TWRP? It seems it's gone.
Click to expand...
Click to collapse
That's because you're not installing it properly go back to my guide and follow it exactly and stop listening to these other people. I've been modding this device since it first came out with Android 9, I know every inch of this device. You're getting confused by what other people are telling you

MarvinMod said:
5- Press and hold vol down and power till the screen turns blank then immediately press and hold vol up. The device will reboot then land you in the twrp splash screen
Click to expand...
Click to collapse
It fails here, on this step. After successful flash of recovery.tar, power + vol down to reboot, cable still connected, nothing you can do now can bring TWRP up. The phone boots into Android.
EDIT: I think I have now got it. I will update in a few mins.

Zilliman said:
It fails here, on this step. After successful flash of recovery.tar, power + vol down to reboot, cable still connected, nothing you can do now can bring TWRP up. The phone boots into Android.
EDIT: I think I have now got it. I will update in a few mins.
Click to expand...
Click to collapse
After successful flash of recovery.tar, power and vol down to reboot, as soon as the phone screen goes blank, immediately release all keys and press and hold vol up. Must be as soon as screen goes blank. The device will then reboot twice and land you in twrp splash screen. You must hit vol down and power after successful flash then when screen blanks, vol up. If you miss this step, twrp will not hold and revert back to stock recovery.

Here is the notes I made today:
****************************************************************
INSTALL + START TWRP
phone is off
press up + dn
insert cable
go into download (press up)
ODIN 3.14 + AP:tar(vbmeta.img+twrp.img), auto reboot off, press upload
when it succeeds, press dn + pwr until it reboots
then quickly up + pwr until it starts (no need to hold down)
this starts in TWRP
from powered off
press pwr button
goes into twrp or android(system) -- depending on what was used last time
if we used reboot->system last time it will now **Always** go into system!
to go back into twrp:
switch off
power cable until charge
pwr + up until it starts
****************************************************************
The above means that you CANNOT go back to TWRP unless you have a cable and a PC near by.