Develop Bugs

[Q] [SOLVED!] Epic 4g Won't Power on. Will Charge though.

<Quote>My epic 4g won't power on. If I plug in a usb cable/ac adapter it will charge the device. The screen comes on and shows the green battery and the amber LED turns on and then turns blue when it reaches 100% charge.
But the power button does nothing. It won't power it on. Is there anything else I can do to force it to turn on?</Quote>
So I got it to boot up. You can do this by holding the power button down while continuously unplugging and replugging in a power adapter (or usb cable). You may spend 2 or 3 minutes unplugging and replugging it in (you need to do this rapidly) but eventually you'll be greeted with the samsung boot screen. If it makes it to the battery display screen you're not unplugging and replugging in quickly enough.
Hopefully o that anyone else who encounters this problem can potentially use their phone in a pinch or recover data off one with a broken power button. My power button is definitely busted and I'll need to get it repaired by sprint unfortunately.
Thanks!

moomoo said:
My epic 4g won't power on. If I plug in a usb cable/ac adapter it will charge the device. The screen comes on and shows the green battery and the amber LED turns on and then turns blue when it reaches 100% charge.
But the power button does nothing. It won't power it on. Is there anything else I can do to force it to turn on?
Click to expand...
Click to collapse
Did you try putting it into download mode? may need to ODIN back to stock.

Ok im new to this forum, as i just ditched my evo shift and picked up and epic, but you might try booting to another menu. Try unplugging it and holding the 1 key on the keyboard then press the power key. If that does nothing then id have to guess ur actual power button is broken. You could also try pulling the battery witih it unplugged for like 5 minutes then put it back in and hold the power button for like 20 seconds and letting it go.
Edit: He beat me to it

It appears the actual power button is broken, neither of those solutions worked. Is there any other way to force it to power up without use of the power button?

My epic 4g won't power on. If I plug in a usb cable/ac adapter it will charge the device. The screen comes on and shows the green battery and the amber LED turns on and then turns blue when it reaches 100% charge.
But the power button does nothing. It won't power it on. Is there anything else I can do to force it to turn on?
Edit: So I got it to boot up. You can do this by holding the power button down while continuously unplugging and replugging in a power adapter (or usb cable). You may spend 2 or 3 minutes unplugging and replugging it in (you need to do this rapidly) but eventually you'll be greeted with the samsung boot screen. If it makes it to the battery display screen you're not unplugging and replugging in quickly enough.
Hopefully o that anyone else who encounters this problem can potentially use their phone in a pinch or recover data off one with a broken power button. My power button is definitely busted and I'll need to get it repaired by sprint unfortunately.
Thanks!

Thank you soo much! I have a messed up Epic that has to be sent back to Sprint but I had to get my work information off of it or I'd be in it deep. Your trick worked perfectly!!

[Q] LQ Optimus G not booting

Here is the series of events. Upgraded to LG optimus G one week ago and that same day, rooted it and installed Cyanogen 10.1. Week goes by functioning completely normal. Today, the battery was down to 5%. Powered off the phone and hooked it to my PC via micro USB cable. Return an hour later to turn it back on. LQ logo appears for a split second then the screen goes dark though still active because of the backlight. Only response I get is when holding down the power button until the screen goes off. It then powers back up and briefly shows the LG logo and the screen is blank again. No response from any other attempt to boot the phone into recovery mode or normal.
Simultaneous power and volume down does not enter recovery mode, nor does any other combination of keys

neghvar said:
Here is the series of events. Upgraded to LG optimus G one week ago and that same day, rooted it and installed Cyanogen 10.1. Week goes by functioning completely normal. Today, the battery was down to 5%. Powered off the phone and hooked it to my PC via micro USB cable. Return an hour later to turn it back on. LQ logo appears for a split second then the screen goes dark though still active because of the backlight. Only response I get is when holding down the power button until the screen goes off. It then powers back up and briefly shows the LG logo and the screen is blank again. No response from any other attempt to boot the phone into recovery mode or normal.
Simultaneous power and volume down does not enter recovery mode, nor does any other combination of keys
Click to expand...
Click to collapse
Are you holding down the power button while still plugged in? In essentially the exact same scenario you are experiencing, my phone will not turn back on if I have it plugged in.
Unplug it, hold down the button until LG logo appears and release while LG logo still on the screen. That's how I have to do it.

neghvar said:
Here is the series of events. Upgraded to LG optimus G one week ago and that same day, rooted it and installed Cyanogen 10.1. Week goes by functioning completely normal. Today, the battery was down to 5%. Powered off the phone and hooked it to my PC via micro USB cable. Return an hour later to turn it back on. LQ logo appears for a split second then the screen goes dark though still active because of the backlight. Only response I get is when holding down the power button until the screen goes off. It then powers back up and briefly shows the LG logo and the screen is blank again. No response from any other attempt to boot the phone into recovery mode or normal.
Simultaneous power and volume down does not enter recovery mode, nor does any other combination of keys
Click to expand...
Click to collapse
Its not going to charge with the battery that low on the computer. you need to power it off (vol down + power) and plug it into the wall charger. leave it for 30 min. unit should turn on at this point. if not read the repair guide in this thread or jump on the irc and myself or some of the other people can help you.

octhrope said:
Its not going to charge with the battery that low on the computer. you need to power it off (vol down + power) and plug it into the wall charger. leave it for 30 min. unit should turn on at this point. if not read the repair guide in this thread or jump on the irc and myself or some of the other people can help you.
Click to expand...
Click to collapse
The USB port I was plugged into was a 3.0 which has extra power sent through it via a bios setting specifically to charge phones. Anyway, I disconnected it and it is now connect to an adaptor from a wall outlet. We'll see what happens in the next 30 min.

[Q] Tab 3 7.0 SM-T210 reboot loop and no recovery

Hey guys, have a friends Galaxy tab 3 (7 inch, SM-T210) which simply won't power on.
Firstly, the device came to me because it was completely dead. He is using an Apple charger (5v 1A) which I believe isn't the right output.
After leaving it plugged into the Apple wall charger for more than a full day, it will power on the display and go into a boot loop (displays Samsung logo for about 10secs then reboots).
It never gets to a point where it shows the battery charging icon.
If I do anything to it (hold power button, power+home+volume up, power+home+volume down) while it is in this reboot loop, it simply dies again and needs the full (more than) a day charge again before powering on the display.
It won't go into recovery or download mode.
The longest I have left it charging thus far is about 2.5 days and still the same problems.
I have tried disconnecting the battery connector multiple times also (left disconnected for up to 5 minutes) - this just causes me to have to start the whole charging process again.
Any ideas? I'm currently leaving it plugged into my PC (rear powered USB port) in the hope that it will charge properly - or at least detect a connection to the PC when it enters the bootloop (maybe try ADB).

@fubofo
I know it is difficult.
A) Regards the Power Adapter.
Listen PC USB port should not be used as a charging station. You always run the chance to burn your PC!
In the other hand PC USB is designed to produce 5V but only 0.5 A.
We should always used the Power adapter that came as original accessory. I own a TAB3 10 wifi. Due to our 10" big screen our OEM adapter is 5V 2A. But in your case 5V 1A is fine. It just charges slower.
B) The most used solution is get in to Download Mode and Install Original Stock software. The other possible solution is to get into Recovery Mode and do a Wipe of Cache and Dalvik and if possible a Factory Reset.
I know you said: "It won't go into recovery or download mode." But there is no other way.
In my cases Tab3 10 Wifi I can not get the battery out. But since you are saying that you can, I will suggest you unplug the battery for a minute. Hoping that when you reconnect it it would not turn on by it self:
1) Turn your PC On.
2) Start Odin3.07 and prepare to install your Original Stock ROM.
3) Connect the USB Cable to PC but NOT to TAB. As you see we only want to be ready to install Stock Rom is everything goes OK.
4) Disconnect the Battery on Tab, (If not possible Press Power for 6-8seconds and release, If it reboots Press Power for 6-8seconds and release. Keep trying until you see it stop doing the loop with Samsung logo. We are trying to ensure is in OFF and that it does not reboot)
Note: Please understand that if you keep pressing [Power] or any other sequence of buttons longer that 8 seconds it just loop once and nothing happens. You need to release the [Power] button.
5) Wait a minute disconnected. (OFF)
6) Reconnect Battery. This is where I an hoping that the Tab will not Turn On by itself! I do not know I never disconnect my battery.
7) Be prepare to Hook the USB cable from PC. Now Press ONLY [Volume Down] and Hook USB cable at the same time. It is been said that when we press Just [Volume Down] from OFF the battery registers are reset and the Battery Icon comes up in your screen!! At least this behavior work in TAB3 10 Wifi. I am not sure in yours.
If you see I am just trying to get away from the "Loop on Reboot" situation. And I believe it your best chance to ensure is in charging state. If you like you can leave it charging for at least 1 hour with the battery logo. If the battery logo goes away and you want to check if it is still there DO NOT USE [Power] BUTTON. use the [Menu] instead. In fact in this mode you can unhook the PC USB cable and Plug your Power Adapter with I believe is twice as effective charging than the PC USB.
Now lets say that when you unplug and reconnect the battery, Tab3 instead Reboot (power on) Then what I will suggest you is to get help from some body else so that you have an extra pair of hands. The Idea is that if it power on by it self ,that you can be only in charge of Pressing Just [Volume Down] while hooking USB cable. The other person will be in charge on reconnecting the battery. I hope you get my point.
Lets continue
8) So now that you have a TAB charged you can ensure that PC is connected to USB cable and Odin is ready.
9) With the battery Icon on the screen, now you can Press [Power]+[Menu]+[Volume Down]. to get in to Download Mode. Note that In my case a TAB3 10 Wifi I do not need to press [Menu], Just Only [Power]+[Volume Down].
10) Follow any Tutorial in the use of Odin for your device. Just be sure NOT to mark "Re-Partition" unless you had received a packages that requires that. If you do not know that means it is NO repartition. Understand that re-partition without having a complete package will Brick your device. Most Odin packages have only the minimum packages so do not required re-partition. You been warned.
I hope this will help you.

r2d23cpo said:
@fubofo
......................................
1) Turn your PC On.
2) Start Odin3.07 and prepare to install your Original Stock ROM.
3) Connect the USB Cable to PC but NOT to TAB. As you see we only want to be ready to install Stock Rom is everything goes OK.
4) Disconnect the Battery on Tab, (If not possible Press Power for 6-8seconds and release, If it reboots Press Power for 6-8seconds and release. Keep trying until you see it stop doing the loop with Samsung logo. We are trying to ensure is in OFF and that it does not reboot)
Note: Please understand that if you keep pressing [Power] or any other sequence of buttons longer that 8 seconds it just loop once and nothing happens. You need to release the [Power] button.
5) Wait a minute disconnected. (OFF)
6) Reconnect Battery. This is where I an hoping that the Tab will not Turn On by itself! I do not know I never disconnect my battery.
7) Be prepare to Hook the USB cable from PC. Now Press ONLY [Volume Down] and Hook USB cable at the same time. It is been said that when we press Just [Volume Down] from OFF the battery registers are reset and the Battery Icon comes up in your screen!! At least this behavior work in TAB3 10 Wifi. I am not sure in yours.
.....................
I hope this will help you.
Click to expand...
Click to collapse
@r2d23cpo thanks for this information, though there is a problem. As soon as I unplug it from the wall charger it stops the reboot loop and just does nothing.
Also....why do I need to connect it to PC via USB with Oden if we are not yet going to flash it? Would the wall charger works just as well after I connect the battery? (disconnect battery, wait 1 minute, reconnect battery, Hold Vol Down + connect charger)

fubofo said:
Hey guys, have a friends Galaxy tab 3 (7 inch, SM-T210) which simply won't power on.
Firstly, the device came to me because it was completely dead. He is using an Apple charger (5v 1A) which I believe isn't the right output.
After leaving it plugged into the Apple wall charger for more than a full day, it will power on the display and go into a boot loop (displays Samsung logo for about 10secs then reboots)....
Click to expand...
Click to collapse
I've noticed this with the Apple charger. But only with this particular model. I experienced none with the SM-T217. Other Samsung devices also charge fine with the same charger. The tab wouldn't show the battery icon at all, and the screen kept flashing. I left it plugged in for 1/2 hour and it moved up 1%. I don't believe it's the amp, 'cause the tab charged fine with a 1A Samsung or LG. You should switch to another charger first lest it damages the battery somehow.

graphdarnell said:
I've noticed this with the Apple charger. But only with this particular model. I experienced none with the SM-T217. Other Samsung devices also charge fine with the same charger. The tab wouldn't show the battery icon at all, and the screen kept flashing. I left it plugged in for 1/2 hour and it moved up 1%. I don't believe it's the amp, 'cause the tab charged fine with a 1A Samsung or LG. You should switch to another charger first lest it damages the battery somehow.
Click to expand...
Click to collapse
This Tab doesn't ever get to the point of showing the charging icon. I currently have the device plugged into USB port of my server as it's powered on 24hrs. I'm happy to leave it in there for a few days to see if it charges better.
My hope is that it will at least get to the boot loop stage, and maybe show up as a connection on my server so I can fastboot it or something.

fubofo said:
This Tab doesn't ever get to the point of showing the charging icon. I currently have the device plugged into USB port of my server as it's powered on 24hrs. I'm happy to leave it in there for a few days to see if it charges better.
My hope is that it will at least get to the boot loop stage, and maybe show up as a connection on my server so I can fastboot it or something.
Click to expand...
Click to collapse
Not to belabor the point, but mine wouldn't charge at all at 500mA, which is what my regular cell charger outputs. So unless your server delivers more punch than standard USB ports on PCs, looks like you're in for a long and futile wait. Just my guess.

Plugged in audio jack in to Tab S 8.4 it shut down and now it's impossible to restart

What could have happened? I tried the Power Button + Volume Down + Home Button method and it still doesn't restart. Normally, I'd plug in a USB charging cable to "jump start" it so that it starts showing the charging level but this time, no dice.
edit: I manually changed the battery to a spare one i had laying around and now it works. audio jack ****ed up the old battery some how?

New pixel C not charging - can it be charged in recovery mode?

This is the third new pixel C I've tried this week(!) and they've all had the identical problem.. It would be incredibly bad luck to have 3 defective devices so I'm wondering if this is a known problem and there's something I can do to fix it.
The device will never go further than flashing the google logo very briefly. The light bar shows all red for a fraction of a second, then nothing. After this point the display is blank and the light bar is dead and does not respond to tapping.
If I go into recovery and select 'turn off device', the light bar is responsive but just shows a single red segment.
I've also tried the usual 10-20 seconds power off and the volume up/down/power switch combinations.
Is there any way of getting the device to charge from recovery mode?

Wonder if it's reasonable to assume that recovery mode consumes less power so the problem is a deeply discharged battery and I think that is a significant issue with Lipo cells. I assume your " 10-20 seconds power off and the volume up/down/power switch combinations" are those recommended at https://support.google.com/nexus/troubleshooter/3337561?hl=en-GB&ref_topic=6023299
Is the Pixel C charger "intelligent" ? - try a basic charger or a PC if you have a usb A/C cable?

Booted to recovery, powered it down from recovery and left it 2 hours. After a couple of attempts it booted :victory:

I left my pixel c on charge for the night (usb charge hub, 5v/2a, way I've used to charge since I got it), pixel c keyboard attached in the laptop position.
This morning I got up and press the power button to check it is charged and it was sitting on 0% saying it was charging... Power it off, leave it plugged into the wall charger that came with it and 3hrs later still nothing.
Recovery, turn off, closed it up so the keyboard is in put in the bag move, now checked it is charging, 1 red segment flashes. See what happens next. Never had an issue in the previous 7 months of using this device. Very odd, hope it is ok soon... Best Android Tablet I've had, don't really want to buy a new one...
Edit: looks like it is all good. Phew!! Bit strange.

Just Recieved and the same
Another one here with the same "issue" or strange thing that it does before start charging

I have the same issue. I can't get the thing to turn on at all. How do I even get it into recovery?? All I get is the google logo for 1 second, then the bars turn red and everything turns off.
Power button does nothing. Power+Vol Down does nothing.

I have a similar issue! Welcome to 2021. I plug in to charge, lightbar goes to Google colors and then red. It'll do that back and forth without turning on. Any ideas?

Had same Problem. Press vol up and down and then Connect the charger. Then I coud boot in recovery mode. From there rebooted in Android and charge up