Nokia lumina 630 won't do anything

[Sarahloub]

My son agreed to an 'upgrade' on the way to school but then said it went off and when he went to turn it on after school it wouldn't turn on. I've tried charging it to no avail. I've had an error message your pic needs to restart with an error code that looks like 0x0000005c. Text tiny! And I'm now stuck with a lightening flash and one cog image on the screen. Help!! Thanks