No sound since upgraded

[AC Question]

upgraded htc last night. Now don't have any sound while calling or receiving calls. Tried upgrading chrome. Tried switching mobile off and on and tried checking volume settings. Mobile now doing nothing and went blank then had green flashing light for few minutes but nothing. Wont even charge

 

[B. Diddy]

Welcome to Android Central! Which HTC phone? What was the upgrade for, 4.4.4?