[Windows Central Question]

I wanted to update my lumai 720 and in the process I stop the process when it could not further the update and since then my 720 lumia does not turn on or respond to any touch

[ven07]

Try holding down power and vol down buttons/ try holding all the buttons in/ try holding down only the camera button for 30 seconds/ try connecting the phone to laptop/PC to see if you can access it..

If all fails, then download the Lumia Software Recovery Tool, install it, run it, select phone won't restart and follow the instructions... Keep in mind this will wipe your phone

[xandros9]

Try holding power + vol down for 10-15 seconds or until it vibrates.

Looks like interrupting the process something could've gone wrong.
Try charging it.