My phone shows an exclamation mark in a triangle on a black screen
Your phone may display an exclamation mark in a triangle on a black screen. This screen is called recovery mode, and is usually accessed from the bootloader menu on an Android device. The most common cause of issues with recovery mode is when the device has been rooted; or having installed a custom ROM.
Follow these steps to leave recovery mode and boot your phone normally: Press and hold POWER until the Phone Options appear. Select Power Off and wait for the phone to fully turn off. Wait for a few moments, and then power the phone on by pressing and holding thePOWER button.
Turn on the device.
If recovery mode appears again, hold VOLUME UP, and then press the POWER button.
Use VOLUME UP or VOLUME DOWN to highlight Reboot system and press thePOWER button to select it.
A factory data reset can also resolve some software issues. At last visit the service centre.
Thank you for Joining Samsung community. We would recommend taking some troubleshooting steps to further isolate what you may be experiencing. Find troubleshooting steps on provided link http://www.samsung.com/in/support/skp/faq/1101689. Please let the us know what steps you have taken and if you have noticed any changes or improvements. This will help the Community to provide you steps without repeating any steps you may have already taken. Be sure to hit ♡ when you find an answer that works for you.
