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How to fix Galaxy J7 black screen issue: screen slowly turning black

For those of you who are looking for answers how to fix some of the common issues for the #GalaxyJ7, this post might help. Today’s J7 troubleshooting article addresses three common problems. Make sure to check them all.

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 fix Galaxy J7 black screen issue: screen slowly turning black

My Samsung J7 2016 model is having a black screen. At first it was darkened only at the notification bar but it has now slowly occupied the whole screen. Though all the buttons and touch are working perfectly but I am unable to see the screen. Also restarting is not helpful. I tried pressing volume up + home + power button and released power button after it started but could not perform any further task as I could not see anything on my screen. Please tell me whether I should take it to a store or will I be able to fix it at home.

Solution: Samsung Galaxy screens are usually tough and almost always reliable. They don’t just break under normal use. We don’t know the full history of your device but if your screen started behaving this way after accidentally dropping the device, or after you got it wet, there’s nothing much that you can do on your level. In any of these cases, repair or screen replacement is the least that must be done.

If your device was never physically damaged, there’s a chance that the problem might be caused by a software or operating system bug. To see if that’s the case, you can try booting the device to alternate modes. If your screen works normally in any of these modes, then the issue must be software related, which means you may be able to fix it. If the screen remains black though, that means you have a hardware issue at hand. In that case, you need to send the phone in for repair or replacement.

For reference, these are the steps on how to restart your device to alternate boot modes:

How to boot a Galaxy J7 to Recovery Mode

  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 Bixby 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).

How to boot a Galaxy J7 to Downlod Mode

  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 Down key and the Bixby key, then press and hold the Power key.
  3. You’ll know if you’re on Download Mode when you see a screen that says “Downloading….”

Being able to boot your phone to any of these modes does not mean the issue will be fixed right away. It only means that you have a good chance of fixing the issue yourself and not having to send the device in for repair. For example, if the screen works normally in Recovery Mode, you may be able to fix the problem by doing a master reset.

If the phone only boots to Download Mode and the screen works normally in that boot mode, you may be able to fix the trouble by flashing stock firmware. Do more research about this procedure if you’re interested to doing it.

Problem #2: Galaxy J7 keeps freezing and won’t turn on

Hi. I have Samsung J7. After android 8 my phone start freezing. after visit Samsung office they did some troubleshooting on my phone and it was working better. but 2 days ago my phone was all dead, Nothing work on that, i tried all the maneuver to restart but fail to turn on the phone. So i leave the phone overnight and  it was TURN ON in the morning by it self. After 3 days my phone again went dead, This time it wouldn’t turn on again by it self. Any more solution ?

Solution: If your phone appears dead right now, there’s a few things that you can do to try and fix it. Follow our suggestions below.

Force reboot

Sometimes, this simple procedure can fix bugs that developed after the system has run for a long time. By manually forcing your Galaxy J7 to reboot, you’re basically simulating a battery pull, which, in older mobiles with removable battery packs, was an effective way to refresh the system. If you haven’t tried this one yet, here are the steps that you can do:

  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.

Use another set of charging cable and adapter

In case the problem lies on the charging cable or adapter, you want to use another, known working set. If you don’t have a spare original Samsung USB cable and adapter, try to borrow them from your local Samsung store. Or, you can borrow one from a friend. Make sure to charge your phone for at least 30 minutes before you attempt to power it back on.

Check the charging port

Another troubleshooting step that you can try is to see the condition of your phone’s charging port. It’s not for your to fix any obvious damage that you may find but more of giving an idea where the issue may be. Try to use a magnifying tool to examine the charging port. If there’s any obvious damage like a bent pin, have it repaired.

Sometimes, lint or dirt may block the charging cable from making contact properly. Be sure to clean the port up using a can of compressed air. Do not insert anything in the port to avoid damaging the system.

Repair

If doing all the suggestions above won’t fix the problem at all, then the most likely problem is beyond your ability to fix. As far as software troubleshooting is concerned, there’s only so much that can be done. You can’t obviously do software troubleshooting when the phone does not power on in the first place. Contact Samsung to get support.

Problem #3: Galaxy J7 photos in SD card gets corrupted

Hi there! so I have a Micro SD card in my samsung J7 When I take pictures and store them on my card, some pictures are fine but Some appear to be greyed out with a big circled! mark so that you can not see them while Others are there in thumbnail size when you preview the album but the when you select the image to open it it opens ok. but then after day 1 to 2 secs the image becomes covered with thick lines of varying colors so you lose the image. I have reformatted the card rebooted the phone and have tried without much success to clear the cache. Svenmargie

Solution: If nothing changed after the SD card has been reformatted, the next good thing that you can do is to see if it’s phone issue. Make sure to follow the solutions below.

Reset app preferences

Some apps require other apps or services in order to work properly. One of the apps that do is the stock Gallery app that you use to browse photos. Other photo browsing apps also need other apps and default services in order to work normally. To ensure that your device’s default apps are all enabled, follow the steps below:

  1. Open Settings app.
  2. Tap Apps.
  3. Tap More settings (three-dot) icon at the upper right.
  4. Tap Reset app preferences.

Reset all settings

The other good thing that you can do is to reset all settings on your phone. This procedure is separate from the previous one as it covers all settings of your Android device and not just the apps. To do this, follow the steps below:

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap General Management > Reset settings.
  3. Tap Reset settings.
  4. If you have set up a PIN, enter it.
  5. Tap Reset settings. Once complete a confirmation window will appear.

Factory reset

If both suggestions above won’t help at all, consider returning your J7’s software settings to their defaults. Be sure to back your files up first before doing this.

  1. Create a backup of your data.
  2. Turn off the device.
  3. Press and hold the Volume Up key and the Home key, then press and hold the Power key.
  4. 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).
  5. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  6. Press Power button to select.
  7. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  8. Press Power button to select and start the master reset.
  9. When the master reset is complete, ‘Reboot system now’ is highlighted.
  10. Press the Power key to restart the device.

Get a new SD card

The difficult part in troubleshooting this type of issue is the lack of method to check what the problem really is. If nothing works at this point so far, that means that there’s probably no issue with your phone. We suggest that you get a new SD card to avoid losing or corrupting your files.

 


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.

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