Chosen Solution

my phone produced a beep sound and than turned off i left it for several hours but still it is not turning on charge was more than 70%.what should i do now???

@nimijiya the first suspect should always be the battery, regardless of what percentage it shows. It is not a good indicator of the condition of the battery. Start by checking a few things like this

You can of course always try a hard reset as well:

  1. Turn off the phone. 
  2. Press and hold both Volume UP and HOME + power on the phone. Keep pressing the VOl + home.
  3. When Android Recovery menu screen appears release all keys.
  4. Navigate and highlight “wipe data / factory reset” using the Volume down key and press power.
  5. Navigate and highlight again to Yes – delete all data and press power.
  6. All data will be lost! Before doing a hard reset backup all important data.  After hard reset is done select Reboot system now. Press power to reboot the phone.