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S9 won’t boot up

What you can do if Galaxy S9 won’t boot up or stuck on Samsung logo screen [troubleshooting guide]

Today’s troubleshooting guide for the #GalaxyS9 device addresses the issue if your phone fails to boot up normally, or if it can’t go past the Samsung logo screen. This situation usually occurs if Android encounters an error, or if it’s been corrupted. At other times, it can also happen following an update, or an failed flashing procedure. As usual, we include a sample case to give our readers a context of where our suggestions are coming from.

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.

Today’s problem: Galaxy S9 stuck on Samsung logo screen

So I have a galaxy S9, that I had to turn off to enter a place, and when I attempted to turn on… well it got stuck on the first screen, and never got passed that ever again. It’s the normal title screen, and it reads like so: “Samsung Galaxy S9 Secured by knox POWERED BY  android” In white letters, black background. I have no idea what the actual operating version is on, I assume the latest because I allow the phone to update regularly. I have also bought the damn thing unlocked, meaning that Verizon is not responsible for dealing with it. And if you guys got nothing I’m just gonna return it.  I actually took it to Verizon store, the dude tried something that I haven’t been able to recreate since. He actually managed to open the console looking screen by holding the down volume button or somehow, and he asked my permission to reset the damn thing, to which I said fine. He attempted it twice, and the phone still never gets passed the first screen. So before you say you have note on this, yeah I have read it, and it doesn’t work they way you have described it. It’s stuck on this screen. When I force it to restart, I do hold down the lower volume button, but it does not go to a new screen.  Pure shot in the dark, the latest app I installed on this phone was NJtransit. I don’t suppose that could be it, but I just figured I’d share that information, maybe you guys have heard that happen before. So yeah… would absolutely appreciate it if you could help in any way. I can’t even turn the damn thing off. — Faez Dabestani

Solution: Hi Faez. The first important troubleshooting step that you need to do in this situation is to try a force restart. It goes this way:

  1. Press and hold the Power + Volume Down buttons for approximately 10 seconds or until the device power cycles. Note: 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. Also, allow up to 90 seconds for the reset to complete.

Force restarting a device is often an effective way to restart an unresponsive or frozen Galaxy device. If you’ve already tried this trick before contacting, continue with the rest of the possible solutions below.

Turn off the phone

Should you be unable to restart your S9 with the steps above, the next good thing that you can do is to see what happens if you turn it off. We understand you’re having difficulty pulling this one off at the moment. In this case, the only thing that you can do is wait until the phone drains its battery and turns itself off. Then, charge the device again for at least 30 minutes before attempting to power it back on. This way to reboot the system may take some time, especially if the battery is full. Depending on how fast your phone loses battery power, this can mean waiting for a few hours to several days. There’s no way to hasten the phone’s battery drain rate so all you have to do is wait. Turning off the device is a requirement to perform the rest of the suggestions below.

Restart to Safe Mode

Once you’ve phone has turned off, the next logical troubleshooting step is to verify if there’s a third party app that interferes with the operating system. You can do that by restarting your phone to safe mode. Safe Mode blocks all third party apps and services so it’s if one of them is the cause of your problem, you should know it.

To restart your S9 to safe mode:

  1. Turn off your S9. If you can’t turn it off normally, let the phone drain its battery until it turns itself off.
  2. With your S9 off, 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 your phone boots to safe mode successfully, let it run for up to minute and see if you can use the basic functions like SMS, voice calling and internet. If everything works, that’s a clear indication that you have a bad app issue. Safe mode won’t pinpoint the exact app though so you have to do the steps below to know which app is problematic:

  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 S9 still refuses to boot up normally, repeat steps 1-4.

Cache partition wipe or Factory reset via Recovery Mode

If the phone won’t boot to safe mode at all, you can then try to run it to Recovery Mode so you can attempt a cache partition wipe or factory reset. Recovery Mode is a separate software environment, which means it does not need Android to be working. It’s a good tool to use to determine if Android has a problem and oftentimes, it also provides the ways to fix the problem itself. There are two things that you can do on Recovery mode — cache partition wipe and factory reset. You should try them if you are able to boot your S9 to Recovery Mode successfully. Here’s how to do that:

  1. Turn off your S8. If you can’t turn it off normally, let the phone drain its battery until it turns itself off.
  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).
  4. Use the Volume buttons to highlight an item, then press Power button to select it. So, for example, if you want to factory reset your S9, just press the Volume Down button until the factory reset option is highlighted, then press the Power button to confirm the action.

Remember, just like in safe mode, you won’t be able to boot your phone to Recovery Mode unless it’s powered down. Don’t waste your time bothering to press the hardware button combination if the device is still on.

Flash the firmware via Download

A more drastic solution that you can try, if all the suggestions above won’t help, is to manually change the operating system version via flashing. Flashing is an Android term to, say, update the current firmware version with the most recent one without waiting for carrier update to become available. The same method can be used to downgrade the firmware version, or in your case, replace the current one with the stock firmware version that came with the device when you first unboxed it.

Flashing is basically modifying your device’s software environment so it’s risky. It’s not recommended for newbies so if this is your first time to hear about the term, try not to do this. Using an incorrect firmware version (yes you need to know the right one for your phone model) or doing an incorrect step can seriously damage the software on your device. At worst, you can have a permanently damaged phone. We won’t be discussing how to flash your phone in this guide so make sure to find a good guide that will walk you through the steps. Again, flashing can potentially brick your device so do it at your own risk.

Get professional help

Should nothing works at this point, the problem is most probably unfixable at your level. And if you can’t flash the device on your own, we suggest that you contact Samsung for help, especially if your carrier operator can’t fix it for you.

Your S9 should still be covered by Samsung warranty at this time as well so they should be able to help you fix the problem. Warranty has conditions though so there’s a chance that you may have to shell out for the repair. Go to your nearest Samsung Service Center for assistance. If there’s no nearby Samsung Service Center or store, contact them by email, chat, or phone so you can send your phone to them.

 


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.

What to do if Galaxy S9 Plus is water damaged, shows black screen and won’t turn on

Today’s troubleshooting post for the #GalaxyS9 and #GalaxyS9Plus talks about what you can do if your device no longer powers back on after being exposed to water. As many of you know already, the Galaxy S9 and S9 Plus are water-resistant phones. If you’re wondering why we still bother to discuss water damage issue in this post, that’s because water-resistance doesn’t mean the Galaxy S9 and S9 Plus are totally immune to water damage. We say water-resistance in phones are overrated. Try to take a look at one of the cases in this post and see how water resistance can fail.

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: What to do if Galaxy S9 Plus is water damaged and won’t turn on

So I was in bible study and I forgot my glasses on the couch so I picked up my glasses but root beer had spilled all over my phone including my charging port so I of course started drying it and sticking my toothpick in to get the root beer out and I used a hairdryer but I had it on high and on cold but i had let go of the cool button and the heat I guess touched the heat was to hearse and my phone is not powering on nor charging am. I’m too scared to charge it and i don’t even know if the root beer gone because my phone wont power on and tell me but every time I try to power it on, it shows like a line for like a second then it go off, then when I try to charge it it vibrates but it wont turn on and last time I charged it, I got shocked due to moisture. I’m out of ideas to turn on my phone. Please help my phone. i’m only 12 years old in a huge mistake. By the way I have the S9+. — A.kyabasinga9

Solution: Hi A.kyabasinga9. The Galaxy S9 and S9 Plus are water- or liquid-resistant so it could have handled occasional or accidental liquid splashes. All you need to do if you found your S9 Plus wet, even in the charging port area, is to rinse it gently with clean water, wipe it with clean soft cloth, and let it air dry. Water naturally evaporates in a few hours so leaving your phone in a warm location like near the back of TV should help hasten the process. There’s no need to stick something in the charging port as that can potentially damage seal that keeps water or liquid out, or bend a pin that makes contact with the charging cable. Applying too much heat on the charging port using a hairdryer is not a good idea as that might melt the nano particles that comprise the water seal in the port.

To see if you can fix the issue at your end right now, here are the things that you want to try:

Let the phone air dry. As mentioned above, water will eventually dry out on its own. Because your phone got wet by root beer, you want to ensure that there’s no non-water residue in the charging port. You can do that by rinsing the phone with clean pot water. Make sure to use non-pressurized water to clean the charging port. Once you’re confident that the charging port is cleaned properly of any root beer particles, wipe the phone with a clean towel. Then, you want to shake the phone gently to dislodge water from the charging port. Afterwards, leave the phone near an indirect source of heat. Do not place your S9 near an oven or furnace, or outside where it’s going to be exposed to direct sunlight. Doing so is a sure way of damaging your device. Let the phone dry itself out for at least 8 hours. Afterwards, try turning the phone back on and see if it works, or if it charges normally again.

If you’ll get the moisture detected error after drying the phone for several hours, that means the USB port area is still wet, or there may still be some water particles left. Let the phone dry out for several more hours in normal room temperature before attempting to turn it back on.

Use another set of charging accessories. If your phone no longer show moisture detected error but continues to refuse to charge, the next good thing that you can do is use another charging cable and adapter. If you can’t find an original Samsung charger for your S9, go to a nearby Samsung store and try to borrow their S9 charger. This should help you determine if the problem is being caused by a bad charger or not.

Charge your S9 wirelessly. In case the charging port was damaged when you insert a toothpick in it, you can still continue to charge your device using a wireless charger. Wireless charging is significantly slower than regular cable charging but it’s a good workaround if you encounter a problem with the USB port. It’s also a good temporary alternative if you don’t want to send the phone in for repair right away due to a bad USB port.

Get professional support. If  you’ve already tried our suggestions above and your phone still refuses to charge properly or at all, that means your S9 has a hardware issue. To fix it, you need Samsung technician to open it up so a complete hardware diagnostic can be performed. If you did manage to damage the phone with liquid, Samsung will declare the warranty void and you’ll most probably end up paying for the repair. If you want to have a guaranteed fix though, we still recommend that you let Samsung fix the phone for you. While you can definitely send your phone to an independent service center, there’s a chance that they may not be able to repair the phone permanently.

Problem #2: Galaxy S9 shows black screen and refuses to boot up

I have been having issues for weeks of battery going dead just seconds to minutes after being removed from charger and it was burning me to just touch on but mostly off the charger. Then I started getting messages from phone and my connected PC saying blue light filter was not working. Now this is something i have never turned on or messed with because I have a hard enough time seeing the screen without it being dark. Well today I took advice from someone at t-mobile and I cleared the partition cache. Once I hit yes and it was done I tried to get to reboot but phone shut off. When I try to turn it back on into any type of mode it just goes to black screen that says rebooting in top left corner and then shows droid guy. It will just keep doing this over and over. I was able to reach a Samsung support tech threw a chat but all they could tell me is how to get it to shut off by pressing and holding volume down key and power key for 30+ seconds. O and this phone is rooted and originally a Verizon phone but was unlocked to use my carrier. I have already spent so much money and time on this phone and really hate idea of having to spend more because of yet another problem. Please let me know if there is anything at all I can do to save myself an hour drive and more money on this device.  Thank you, Mary P.s After reading threw all your troubleshooting I really wish I had found this page first. — Mary Hoke

Solution: Hi Mary. We can’t see any connection between doing a cache partition wipe and your S9 refusing to boot normally afterwards so there must be another factor at play. What that factor is can be anything. The good thing is, you’ll most likely fix the issue on your end since you were able to previously clear the system cache before it became unstable. To do that, do a factory reset and see what happens. Here’s how:

  1. If possible, back up data on the internal memory. If you have signed into a Samsung account on the device, you have activated Anti-theft and will need your Samsung credentials to finish the master reset. If you can’t create your backup because the phone refuses to power back on normally, you’re out of luck. To proceed, follow the rest of the steps.
  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.

Should factory reset won’t fix the issue at all, consider unrooting your S9 by flashing stock firmware to it. We presume you know how to do this since you currently have a rooted phone. If you don’t think you can do it, do some research on how to unroot your device. Some root software has their own way of unrooting a device but a universal way to do it is via Odin. Flashing stock firmware to your S9 will basically delete the current software so you’ll also lose your personal data, even if you did skip factory reset above.

 


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.

Galaxy S9 won’t boot up after installing system update, keeps restarting when SD card is mounted

Welcome to another #GalaxyS9 troubleshooting article for the day. This post will answer some issues reported by some S9 users after installing the most recent update for Android Oreo. If you have your own issue on your S9, be sure to check this post out for solutions. Or, you can contact us instead so we can find solutions for them and post them in our blog.

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: Galaxy S9 won’t boot up after installing system update

I’ve tried to download the latest update 4 times now and it gets to 30% and then comes up with ERROR! with a yellow triangle and an exclamation mark in the middle of it then the little android guy with x’s for eyes. I have gone through all of the troubleshooting tips, and nothing seems to work, and I even did a factory reset of my phone which the troubleshooting guide said would work. Please help, I’ve only had this phone for a couple months and I’ve never had this problem before today. — Jennifer Uccardi

Solution: Hi Jennifer. If your phone was working properly before you installed an update to it, the reason why it no longer boots up must have something to do with with its bootloader or firmware. Bootloader is a special software that prepares all the necessary stuff in order for Android to work. In other words, it’s a code that’s not necessarily part of the operating system but is an integral part of the entire system. Sometimes, the bootloader may be corrupted during an update, especially if a user interrupts the installation by restarting or shutting down the device. Some update installation may take hours to complete depending on the number of apps and device so it’s not uncommon for impatient users to mistakenly turn off their phone. That’s a big no-no and one of the surest ways to kill a device. At other times, installation progress may be interrupted because a user failed to charge the phone before doing the update. If any of these things occurred during the update, you may or may not be able to fix the issue.

Another reason why your phone does not boot up anymore is a corrupted firmware or Android operating system. Like the bootloader, Android may get corrupted if you interrupt the update installation intentionally or unintentionally.

Re-flash the bootloader and/or firmware back to stock

To see if you can fix the issue on your end, you can attempt to re-flash the bootloader and/or firmware. Flashing is a term used to refer to the process of installing the bootloader or firmware manually, as opposed to letting the device do it on its own, like when you download and install an update over the air (OTA update). Flashing is not for everyone and it requires some level of computer and Android skills. It’s not recommended for most Android users because it’s risky and can potentially damage the device for good. It also involves some amount of research like looking for guides and firmware.

We don’t usually provide flashing guides in our blog as they can vary by phone model. If you want to try it out, we suggest that you start your research by going to XDA Developers Forum and ask some users for the correct way to flash your phone. As we’ve said, flashing is risky so be sure that you’re ready to accept the fact that your phone may die in the process. In general though, majority of careful users tend to do it successfully so it’s your choice. Just remember, your goal in doing this is to install the stock or official Samsung- or Carrier-provided firmware on your device, preferably the original firmware version that came with your phone.

Get professional help

The easiest way to fix your issue is still be going the Samsung route. Just bring your device to your local Samsung Service Center and let them handle the rest. This may or may not be a paid repair depending on the current state of your phone. They’ll most likely end up re-flashing the device with stock firmware but at least you’ll know that trained personnel does the job for you.

Problem #2: Galaxy S9 keeps restarting when SD card is mounted

I have a Samsung S9 which was updated to Android 8 Oreo on the 23 June 2018. Since installation the phone continually restarts so I cleared the cache and also removed lots of apps but there is no shortage of space. currently 30gb on internal storage and 68gb on SD card. However when the SD card is unmounted the phone is fine absolutely no continual restarting. as soon as the card is remounted the problem reappears. I have a Samsung SD card installed. This is a really frustrating problem I do hope that Samsung pull their fingers out quickly to resolve this for all their disgruntled customers. — Hugh

Solution: Hi Hugh. Does the problem occur only with the current SD card or with any SD card? To know the answer to that, try to use another SD card by borrowing one or by testing one from a store. If your S9 only becomes problematic when using your Samsung SD card and not with others, that means that your current SD card is interfering with Android. It may have become damaged or corrupted. To see if you can fix it, try to reformat it using your S9. Here’s how:

  1. Open Settings app.
  2. Tap Device maintenance.
  3. Tap Storage.
  4. Tap SD card.
  5. Tap More settings at the upper right (three-dot icon).
  6. Select Storage settings.
  7. Tap SD card.
  8. Tap Format.

If you cannot reformat the card due to constant reboot, use a computer or another phone to do it.

If your S9 has a problem with all SD cards though, you should reformat it to fix possible operating system bug. Here’s how to do that:

  1. Create a backup of your data.
  2. 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.
  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.

Problem #3: Galaxy S9 Instagram won’t post photos or videos

Hi! So my problem is with Instagram. It just stopped publishing photos/videos on my stories and apparently now on my feed too… On my instastories it says ‘Posting…’ and it says like that for 24h and then it disappears. I uninstalled the app and installed again, I logged out and in, turned the phone off and on again, looked for the last updates (for the app and my phone too), tried to use only wifi, only mobile data and both at the same time, I cleared the cache and the data and it still not works… Then I remembered to try to post it using my old Asus tablet and it worked…. Can it be just an issue with my phone? It as been working super fine, the app never crashed before. I didn’t do the soft reset because I can’t take the battery out… Any other suggestion? Thank you! — Mariana

Solution: Hi Mariana. There has been an issue with Instagram app in Samsung devices a couple of weeks ago but we believe it’s already been patched. Make sure that you install updates for all your apps including Instagram to see if that will work. If the problem returns after installing all app updates, then you should consider contacting the app’s developers for an answer. You can use the app’s Report a problem link under the app’s settings menu.

Problem #4: Galaxy S9 contacts messed up after installing Oreo update

Hi! My Dad recently installed the most recent update for Samsung Galaxy S9  and now in his contacts the letter A and all of the contacts under it are missing while an ampersand takes the letter As place. My Dad swears he didn’t change any settings however i do not believe him as he does it all of the time even when i have warned him not to touch his settings. I trying googling this situation but couldn’t find anything remotely close to this issue. Can you help resolve this so i can get my Dad off my back to fix it? Thanks! — Jessica_sousa

Solution: Hi Jessica_sousa. We are not aware of any setting that might had been changed to cause the situation you’re in right now. If you want to return everything to normal or their defaults, we suggest that you factory reset the phone. Before you do so, be sure to back everything up, especially your dad’s contacts using Samsung Smart Switch.

For steps on how to factory reset your S9, follow the instructions above.

 


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.