How To Fix Samsung Galaxy A9 No Command Error

The #Samsung #Galaxy #A9 is the latest addition to the A series of devices which sports large 6.3 inch Super AMOLED display and a Snapdragon 660 processor combined with 8GB of RAM.  This phone is also best known as “The world’s first quad camera smartphone” as it sports four rear cameras each with its own purpose to capture the best image. Although this is a solid performing phone there are instances when certain issues can occur which we will be addressing today. In this latest installment of our troubleshooting series we will tackle the Galaxy A9 no command error issue.

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How To Fix Samsung Galaxy A9 No Command Error

Problem: Hi, I have a Samsung Galaxy A9, it has a little bit more than 2 weeks now, yesterday I was using it normally and suddenly it got stuck, I try to restart it or turn it off but it was not possible. After a while it restarted by itself, passed the screen that says A9 but got stuck all night in the next screen that says Samsung. Today in the morning I start looking options of how to make the factory reset, first I did the soft reset (Volume Down + power button) is restarted but got stuck in the first screen this time. After I keep pressing the Volume Down + power button and appear a message Warning! and indicated to Download a Custom OS. It gave me 2 options: 1. To download OS which I tried, but it get stuck in downloading do not turn off. 2. to restart the phone and if I use this option the same thing begin. If I try the hard reset  nothing happens. I cannot turn off the phone, so I let the battery dried out., It did, but as soon as I connect the charger, the phone restarts again. Now the difference is that if I let it run, appears the android logo and a message that says “installing system update” but after sometime, the android fell over with ++ eyes, and a message that says “No command”, by itself appears a new message; “Failed to open Recovery – cause (no such file or directory)…” and more sentenced such as “Reboot recovery cause is unknown”… “No support single SKU”… “File-Bases OTA… and other messages regarding the cache. after a message “successfully verify dmverity hash tree” but again a message like “E: failed to mount /cache (Invalid argument)” and several other regarding cache started. Is there something I can do to fix the phone? As I mention I cannot turn it off or made the hard reset. Thanks for the help.

Solution: One of the main reasons why the phone is displaying the no command error is because it is waiting for you to give a command. I suggest you try doing a soft reset first then check if the issue still occurs. To perform this action just press and hold both power and volume down buttons for at least 10 seconds or until the phone restarts.

In case the issue still persists then perform the additional troubleshooting steps listed below.

Wipe the cache partition of the phone

There are cases when your phone will store cached data of apps in a special partition in its internal storage. This cached data allows the device to open apps quickly making for a faster Android experience however there are instances when the saved data can become corrupted which can cause issues. To eliminate this factor you will need to wipe the cache partition of the phone.

  • Turn the phone Off if necessary
  • Press and hold “Power” “Volume down” and “Home”/”Bixby” at the same time
  • At the Android screen, release the buttons and wait for access to Android Recovery
  • Press “Volume down” to navigate the menu to highlight “Wipe cache partition”
  • Press “Power” to select the highlight
  • Finally, highlight “Reboot system now” and press “Power”

Once this is done check if the issue still occurs.

Perform a factory reset

One last troubleshooting step that you should consider doing is a factory reset. This reverts your phone to its original factory condition. Make sure to backup your phone data before doing this step as it will be deleted in the process.

  • Turn off the phone.
  • Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  • 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).
  • Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  • Press Power button to select.
  • Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  • Press Power button to select and start the master reset.
  • When the master reset is complete, ‘Reboot system now’ is highlighted.
  • Press the Power key to restart the device.

If the above steps fails to fix the problem then this is most likely caused by a damaged display assembly. I recommend that you bring this to a service center and have it repaired.

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Chad Buenaflor

Chad has been in the tech industry since 2000. He has a degree in Electronics Engineering and is interested in the hardware and software side of technology. Initially working for a Japanese semiconductor company as a Test Engineer for nearly 10 years, he then pursued his passion for internet technology by working for the support team of Time Warner Cable then finally joining TheDroidGuy as one of their troubleshooting and tech writers. On his free time he plays his favorite games on his PC, Xbox Series X, and Android phone.

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