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How to fix Galaxy J7 boot loop issue

How to fix Galaxy J7 Pro black screen issue

Hello and welcome to today’s Galaxy J7 (#GalaxyJ7) troubleshooting article. Many J7 users have reported all kinds of trouble for their device so this post is a continuation of our commitment to help our fellow Android fans. We list 4 common problems for this device in this material so hopefully you’ll find it helpful.

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page. When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Problem #1: Galaxy J7 flickering screen issue due to water damage

I got my phone wet in a rain today. It’s not dripping wet but I think the water did get into some parts. At first I tried to restart the phone but soon realized it didn’t work so dropped it into uncooked rice for around 40 minutes. When I took it out, there was blue lights showing once in a while. Then I tried holding the home button, start button and volume up key. The blue screen did go up but the screen was flickering. Then I pressed the up button, nothing happened; so I tried the down volume but no luck either. Now the screen has turned off again but the light is still flickering at the corner. Thank you!

Solution: Let’s be clear here. Galaxy J7 devices are not water-resistant phones so even a tiny amount of water can potentially cause serious problem for its hardware. If your phone was working normally before you got it wet, you can assume it has hardware trouble at this time.

As a band-aid solution, drying the device is a good first thing to try. To do that, you must dismantle the phone, remove the battery, and let the phone sit in a bag of rice or a container with silica gel sachets for at least 3 days. Hopefully, rice or the silica gel will absorb all liquid in the dismantled parts afterwards. Obviously, the idea is mainly to remove all traces of water from the phone. Simply leaving the phone in its current form in a bag of rice may not remove the water, especially those found inside hard to reach areas. It’s also important to disconnect the battery right away to prevent shorting the motherboard or other components.

If your phone’s screen remains problematic after drying, that means water must have shorted the screen assembly, which resulted to permanent damage. Drying with bag of rice is mostly overrated so if you want to know whether or not the phone can still be saved, let a professional check it. Bring it to an independent service center so a qualified technician can check the motherboard and hardware in general.

Problem #2: How to fix Galaxy J7 Pro black screen issue

Hi. I have a J7 pro that’s 5 months old and just had a software update today, Sept. 21, 2018. After the update, my phone rebooted but my screen no longer responds. The home button finger sensor works and so does the two function keys on its side. I took off the screen protector and did the soft reset a couple of times. I can’t access my phone.

Solution: Your Galaxy J7 Pro may have simply stopped responding in the middle of an update causing the screen to appear black. To see if that’s the case, try to force reboot it with these steps:

  1. Press and hold the Power + Volume Down buttons for approximately 10 seconds or until the device power cycles. Allow several seconds for the Maintenance Boot Mode screen to appear.
  2. From the Maintenance Boot Mode screen, select Normal Boot. You can use the volume buttons to cycle through the available options and the lower left button (below the volume buttons) to select. Wait for up to 90 seconds for the reset to complete.

Factory reset

Should the phone remain unresponsive or the screen black after attempting a forced reboot, the next good thing that you must do is to check whether or not the phone can boot to Recovery Mode. If it can, then factory reset might very well resolve the issue.

To factory reset:

  1. Turn off the device. This is important. If you can’t turn it off, you’ll never be able to boot to Recovery Mode. If you are not able to shut the device off regularly via the Power button, wait until the phone’s battery is drained. Then, charge the phone for 30 minutes before booting to Recovery Mode.
  2. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  3. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  5. Press Power button to select.
  6. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  7. Press Power button to select and start the master reset.
  8. When the master reset is complete, ‘Reboot system now’ is highlighted.
  9. Press the Power key to restart the device.

Contact Samsung

If the cause of the problem lies on the firmware or hardware, factory reset will not help at all. So, if the problem remains after wiping the phone thru factory reset, you want to get Samsung’s help in the matter. The least that will can happen is repair which may or may not be free. You have to bring the device to them first so it can be examined by their on-site technician. Sometimes, troubles likes these can also be fixed by flashing stock firmware via Odin so if they’ll try that and everything works, you’ll most probably end up not sending the device for repair.

Problem #3: How to fix boot loop issue on a Galaxy J7

My daughter bought a used Galaxy J7 from a friend. It was wiped and open for her to use. All was going fine until it started bootlooping. We purchased a new battery in case that was the problem but it apparently wasn’t. I did a factory reset but that also didn’t work. I have tried to connect it to our laptop in order to try to flash it and have been unsuccessful with getting the computer to recognize it. We tried multiple cords and each port but no luck. The cords work fine with our other phones. We’ve only had our laptop for a few months. Hp Pavilion. I downloaded the necessary USB drivers, Odin, and Firmware from Sam Mobile for the phone. I’m not tech savvy but have been doing a ton of research to try to fix this on my own. Is there anything else I can do to get the computer to recognize this phone?

I haven’t found anything that helps me for a phone that is stuck on a bootloop along with that the computer won’t recognize. I might be missing it or maybe someone has said something in the communities I’ve tried to read but sometimes they talk way over my head and use abbreviations that I don’t know. It all gets a bit overwhelming and a tad frustrating. I don’t want to wreck her phone further either and can’t afford to have someone else fix it. I also cleaned out the charging port (it charges fine) and made sure the buttons weren’t sticking. Any help you can give me would definitely be very appreciated!!    I don’t know what other information you need if any. I do not know what version it is.

Solution: There can be a number of reasons why an Android device is unable to boot up normally or gets stuck in endless boot loop. These are the common reasons that we often encounter for this kind of issue:

  • software glitch
  • corrupted internal storage
  • bad battery
  • broken or shorted charging port
  • malfunction of Power Management Integrated Circuit (PMIC)
  • shorted motherboard

As an end user, there’s only so much that you can do. Depending on the background of the device, you may or may not be able to fix boot loop. If this phone was working normally before this issue started, you can try booting it to Recovery Mode so you can wipe it with factory reset.

Flashing stock firmware, which is usually an effective way to fix boot loop issue due to software tampering, is obviously out of the question since your computer won’t recognize the device at all. This puts you in a tight situation as there’s nothing else that you can try in this situation. The most likely cause of the problem is not a software glitch but a hardware issue. We suggest that you save enough money so you can let a professional take a look at its hardware and whether or not it can still be fixed.

Problem #4: Galaxy J7 speaker won’t work during calls

Hi. I have a problem with Galaxy J7. Phone didnt fall anywhere. I can not hear another caller when on phone whether he calls or I. But if i turn on speaker i can hear. I can record videos and i can also record my voice. I can watch videos audios etc too. I tried to restart phone but problem is still there. Another person hears me well only i can hear faint sound. The problem is same when using whatsapp. Rest of the users at home have no problem in using their mobiles at all so its not an issue with service provider.

Solution: Do a quick factory reset to check if it’s a software issue. Once you’ve wiped the phone, replicate the issue when there are no third party apps installed. If the issue remains, you can assume there’s a deeper issue that prevents the speaker from working properly during calls.

If the problem goes away after a reset, then it’s possible that it may had been due to a software bug or one of your apps. If the problem returns after installing your apps, one of them must be the cause. Try to use another voice calling app first to see if the current one you’re using is buggy. You can also try to boot to safe mode to see if a third party app is to blame. Here’s how:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.

If the speaker works fine on calls when you’re on safe mode, you can bet an app is behind it. To identify which of your apps is causing the trouble, you should boot the phone back to safe mode and follow these steps:

  1. Boot to safe mode.
  2. Check for the problem.
  3. Once you’ve confirmed that a third party app is to blame, you can start uninstalling apps individually. We suggest that you begin with the most recent ones you added.
  4. After you uninstall an app, restart the phone to normal mode and check for the problem.
  5. If your J7 is still problematic, repeat steps 1-4.

 


Engage with us

If you are one of the users who encounters a problem with your device, let us know. We offer solutions for Android-related problems for free so if you have an issue with your Android device, simply fill in the short questionnaire in this link and we will try to publish our answers in the next posts. We cannot guarantee a quick response so if your issue is time sensitive, please find another way to resolve your problem.

If you find this post helpful, please help us by spreading the word to your friends. TheDroidGuy has social network presence as well so you may want to interact with our community in our Facebook and Google+ pages.

If you are one of the users who encounters a problem with your device, let us know. We offer solutions for Android-related problems for free so if you have an issue with your Android device, simply fill in the short questionnaire in this link and we will try to publish our answers in the next posts. We cannot guarantee a quick response so if your issue is time sensitive, please find another way to resolve your problem.

If you find this post helpful, please help us by spreading the word to your friends. TheDroidGuy has social network presence as well so you may want to interact with our community in our Facebook and Google+ pages.

How to transfer files from Galaxy J7 with a broken screen

Many Samsung Galaxy owners often ask us how they can transfer files from their device with a damaged screen assembly. Today’s troubleshooting article will answer that so hopefully you’ll find it helpful.

Before we proceed, we want to remind you that if you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page. When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Problem #1: How to transfer files from Galaxy J7 with a broken screen

Greetings. I am wondering if you can help me try and recover the files from my phone. Allow me to elaborate: My Galaxy J7 suffered a minor drop, but decided to crack the screen and completely stop responding to any touchscreen inputs. I shipped it off to service while the screen was still showing some contents, but when I got it back it just show the BsOD. I opted not to have the phone fixed, as the repairs would be more than 3 times as expensive as the outstanding debt I still have on the phone. It makes more sense to pay off the remaining dues to my carrier and buy a new phone. However, I do have some images on my phone that were not yet synced to my google account, and I would like to try and retrieve them if possible. My initial plan was to use a micro USB to USB converter, plug a mouse into the phone and sync up any outstanding files to my google account. However, as the screen is no longer functioning, I can’t do that. I can connect it to my PC, but again, I cannot select the “transfer files” option that pops-up on the screen upon connection to PC, as not only the touch screen is broken, but it also does not display anything. My question is whether or not there is an option to skip this safety protocol, and access the files on the phone? Regards.

Solution: Unlike a computer or laptop, a smartphone’s screen is more than just a monitor that displays images that you see. It’s basically your gateway to the system as it also allows you to input your commands via touches. Without a good working screen assembly, you are unable to both see what the operating system is meant to show you (such as the USB options to allow you transfer files) and input your commands (using your touches). Since moving files from your phone to any other device like a computer requires that you unlock the screen, select the right USB option, and navigate to the right menus or directories, you are basically left without a way to do the things that you want. Needless to say, without the screen, there’s nothing much that can be done as far as file transfer from your J7 is concerned. Even if the motherboard was not damaged, you still need to have a working screen in order to transfer files. If those files are worth a few hundred dollars, have the screen replaced first so you can recover them.

Problem #2: How to fix Galaxy J7 boot loop issue

I am hoping that TDG or someone in this group might be able to help me with my Samsung Galaxy J7. On Sunday, I was looking up a shopping mall using the Google search. When the results came up, the first listing was the Google listing for this shopping center. When I hit “Directions” in order to pull it up into Google maps, the screen had some static so up and some other distortion, then it froze and entered a boot loop. I immediately went to the Verizon store and talked to a guy there. We were unable to get it to start in Safe Mode or do any other sort of boot. It just boots over and over and over. Sometimes it only goes to the Samsung Galaxy J7 powered by Android screen, sometimes the outline of Samsung shows up and fills in, sometimes it is able to get to the Verizon screen before freezing and rebooting.

Also, the notification LED is a constant blue with the green LED fading in and out.  I have tried deleting the cache. I have tried a factory reset. I have even gone so far as to download the latest firmware and Odin to completely flash the phone (not worried about what I may lose as far as data goes as I back up regularly). Odin shows success with downloading the firmware, but I cannot seem to get it to install properly. I get to the screen with the resting Android figure and the caution triangle with the statement “NO COMMAND.” I have done the factory reboot, everything that I have found on various guides found on the TDG site. I have done all the various button configurations, tried loading the firmware multiple times, I have tried safe mode, recovery mode, and more. I cannot seem to get the system to reinstall and just get stuck in a boot loop. Does anyone have any ideas on what to do? This has been a solid phone. It has not seen any water damage. It has always been in an Otterbox and the exterior of the phone is in near flawless condition. I really don’t want to have to buy another unit, but I am afraid that this is what I am going to be forced to do. Thank you! Note:  I have taken out the SD card before I did a lot of this. The thing that is odd is the solid blue indicator with the green LED fading in an out. Occasionally I will get the blue line of text “RECOVERY BOOTING…” Sometimes I get a bunch of code at the bottom.

Solution: If factory reset and restoration to its stock firmware did not help at all, then the issue is most probably beyond your ability to fix. The phone may have encountered a coding error it cannot resolve. Whatever that is will most probably remain a mystery. Before you send it in for repair or replacement, you can try flashing its bootloader. Sometimes, a corrupted bootloader may also lead to the issue you’re experiencing.

Flashing the bootloader back to its stock state is similar to flashing the firmware. The only difference is the file type to use before authorizing the proper flashing command. Below are the general steps on how to flash a typical Samsung Galaxy device. Be sure to consult other guides on how to properly flash your particular phone model.

  1. Look for the correct firmware for your phone model and download it. Make sure that you select the right one. It should be the same exact firmware that ran previously on your device. We assume that you list down the firmware version somewhere. If you did not take note of it before, there’s a chance that you may pick the wrong one. As you may know now, using an incorrect firmware can cause complications so good luck with that.
  2. Let’s now say that you have identified the correct firmware. You then want to download it to your computer. The firmware file should have a bunch of files in it like AP_, BL_, CSC_, etc.
  3. Look for the file that starts with a label BL; this should be the corresponding bootloader file for this firmware. Once you’ve identified the bootloader file, copy it to your computer’s desktop or to any other folder that you can easily access.
  4. Proceed with the rest of the flashing procedure using the Odin program.
  5. In Odin, click on the BL tab and make sure to use the bootloader file you’ve identified earlier.
  6. Now, make sure that the “Device Added” status and its “ID:COM box” has turned blue before hitting the START button. This will initiate the flashing of your phone’s bootloader.
  7. Restart the phone once the procedure is finished.

Problem #3: What to do if Galaxy J7 won’t charge using multiple chargers

my Samsung Galaxy J7 suddenly stopped charging.  I thought it was the cable or charger, but they seem fine.  I tried other cables and chargers and none worked, so I believe it is the phone/battery/interface itself… of course this happened just as I about to board a plane…. so I turned off the phone to preserve whatever I had left, but did try an external battery charger – I got a screen with the android icon and some words in red and green and white and something about factory settings.  It said it was downloading and not to turn off the source, but I was in airplane mode, so nothing was downloading. it was stuck on this screen for several hours. I was able to access my stuff, no factory reset happened! and am now trying to upload my photos before the phone completely dies. it won’t charge, and my PC won’t recognize the phone when I connect it via several cables.

Solution: The most probable reason why your phone no longer charges must be a bad charging port. It may had been damaged or may be disconnected from the motherboard. The best thing that you can do right now is save whatever files you can then send the phone in to Samsung for repair or replacement.

 


Engage with us

If you are one of the users who encounters a problem with your device, let us know. We offer solutions for Android-related problems for free so if you have an issue with your Android device, simply fill in the short questionnaire in this link and we will try to publish our answers in the next posts. We cannot guarantee a quick response so if your issue is time sensitive, please find another way to resolve your problem.

If you find this post helpful, please help us by spreading the word to your friends. TheDroidGuy has social network presence as well so you may want to interact with our community in our Facebook and Google+ pages.