My phone j2 is not opening always black screen with word samsung on it what should i do

Try starting it up in "Safe Mode" and see if it will load. If it does, then you have something on the phone you need to remove. Virus, malware, bad app, etc. If, however, it still stops at the manufacturer's name, then you may have to either "Hard Reset" the device, or have it looked at by a tech for hardware issues.

To get into "Safe Mode" please do the following.

1. First turn off the phone.

2. Next press and hold "Power" until you see the manufacturers logo on the screen, then release the power button.

3. "Quickly" press "Volume Down" and hold it for few seconds until you see the message "Safe mode: ON" or something similar.

4. If you wanted disable it, simply repeat the steps above, and you should see "Safe Mode: OFF" rather than on.
 
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