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How to fix Galaxy J7 flickering screen issue [troubleshooting guide]

Hello and welcome to another troubleshooting article! Today’s post will answer common issues on the #GalaxyJ7 as reported by some members of our community. Be sure to browse through the entire article to see if there’s anything that relates to your own J7 issue.

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 flickering screen issue

I have samsung Galaxy J7 over a year now, and since the last month it have some screen issues. At first the screen started flickering a little not, but it grew enormously, now when the brightness is the very less, the screen turn into white shade and it flickers but when the brightness gets increased everything normal. I have tried all the suggestions regarding this issue but the problem still persists. Also since last few days whenever the phone goes into screen saver mode the white screen flickering thing takes place. Kindly provide any solutions for this. Thank You.

Solution: This issue was observed in older Samsung Galaxy models in the past and the bug appeared to be tied to auto-brightness feature. To see if you can fix the issue on your level, follow our suggestions below.

Solution #1: Force reboot your Galaxy J7

Before you do proper troubleshooting, it’s good if you can try to force reboot your device first. Restart is usually effective in dealing with minor, random bugs. Here’s how to do it in your case:

  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.

Solution #2: Turn off Auto-brightness feature

Should nothing work after restarting your device, the next good thing that you can do is see what happens when you turn off Auto-brightness (assuming you use the feature in the first place). If you are not using it, just skip this step and proceed to the next one.

Solution #3: Install system updates

Having the latest Android version not only offers a fresh, new experience but also significantly lessens security threats.  Ideally, you’re supposed to install updates whether you have problems or not. By default, your Samsung device should be set to automatically download and install updates bug if you changed this in the past, be sure to manually check for new Android and security updates under Settings > Software update.

Solution #4: Observe in Safe Mode

There’s a chance that the reason for the problem may be related to an activity of a particular third party app. If you are adventurous when it comes to apps and don’t screen what you add to your device most of the time, it’s only a matter of time before you encounter problems from one of them. To check if you have an app issue, you can restart the phone to safe mode and see how the screen works. When on safe mode, all third party apps will be blocked from running. So, if your J7’s screen works fine on safe mode, this means that one of your downloaded apps is interfering with Android.

To boot your J7 to safe mode:

  1. Turn the device off.
  2. Press and hold the Power key past the screen with the device name.
  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’.
  8. Use your phone while it’s on safe mode (no third party apps will run) for a few hours and see how the screen works.

Remember, if the screen works normally and won’t flicker as you’ve described, you can bet one of our apps is behind the problem. 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.

Solution #5: Reset all app preferences

Resetting app preferences is oftentimes overlooked in many Android troubleshooting articles but when it comes to an issue like yours, it might help a lot. It’s possible that one or some of your default apps may not be set correctly, causing this glitch to occur. Because there’s no way to know if this guess is true, what you need to do is to simply ensure that all default apps are turned on. Here’s how to do that:

Open Settings app.

  1. Tap Apps.
  2. Tap on More settings at the upper right (three-dot icon).
  3. Select Reset app preferences.
  4. Restart your J7 and check for the problem.

Solution #6: Factory reset

Ultimately, you may need to wipe your phone to restore its software information back to their defaults. You must do this if all the solutions above won’t make a difference.

Here’s what you need to do:

  1. Create a backup of your data.
  2. Turn off the device.
  3. Press and hold the Volume Up key and the Bixby 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.

Solution #7: Get Samsung’s help

Any of the suggestions above should fix the problem if the cause is software-related. If your screen flickers due to a hardware malfunction, or if it’s due to a coding issue deep within the firmware, you won’t be able to do something about it on your level. You’ll have to let Samsung resolve it by thru their repair program, or by replacement.

Problem #2: What to do if Galaxy J7 won’t boot up or charge after factory reset

I have the J7 and have a similar problem than some that i read.. the phone at first wouldnt boot up at all and wasnt charging. It would charge and then go to 90 percent but then drop down to 25 or so.. with the charger still in. occasionally i’d get the orange triangle… thankfully i have a note 8 and this is my backup phone but it was perfectly fine till this started happening.

i decided to soft reset and phone started up all while plugged into the charger and then shut off again and id get the lightning bolt with a weird sign of like 50 percent charge. The charge amount would jump all over.

i then booted it up in recovery mode, not concerned with lost data and phone booted up and runs like a charm again but still isnt charging correctly. it’ll give me the error message to use genuine samsung charger which is what i was using… thought about trying to charge it wirelessly but i believe i need a different phone back for that… i on the old battery one of the contacts looks like it had a slight burn mark on it and im not sure if that caused a problem or what but i should check the metal from the port that fried that part of the battery…. the phone works so i wouldnt think its the motherboard but any insigjt u can offer would be extremely appreciated.. thank u.

Solution: If the issue was not totally resolved after you factory reset your device, that means there’s a hardware problem on your phone. It can be a battery issue, a bad charging port, damaged Power Management IC, or a general hardware failure of the motherboard. You need to let a professional take a look at the hardware to figure it out. If possible, let Samsung examine it first.

Problem #3: Galaxy J7 flickering and discoloration on screen after accidental drop

After damaging the screen of my samsung galaxy J7 by accidentally dropping it my screen is flickering and shaking in some kind of yellow/green colors. Mostly when launching an application it starts flickering and shaking. And even showing the upside of the page also at the bottom of the screen (the time, battery and wifi symbols are in this case both at the upperside and the bottom of the screen.) Is there any way to fix the screen? After I dropped it it does seem to work fine for a few weeks and then this started happening. Also the screen and battery are getting really hot when I let the screen on and the flickering amd shaking goes on for a while. As a precaution I turn off the phone when the flickering is is getting very extreme. Thanks in advance!

Solution: The fact that your phone has been physically damaged before, there’s a big chance that repair may be the only effective option to fix it. Samsung Galaxy screens are generally reliable and can work for years without issues if used properly. Any flickering or discoloration is almost always caused by bad hardware. You can try to factory reset it to see if the problem is software-related (most probably it’s not) but you’ll still probably end up having it repaired. If you’re lucky and the physical damage was only isolated to the screen, replacing the screen assembly would resolve the issue. However, if there’s a motherboard issue or if there are other components in the motherboard that were broken, you’ll probably end up having to either have the motherboard and screen replaced (very costly and impractical) or having the entire phone switched out.

 


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