Took my car to get a bumper dent fix , 2 cars rolling out the shop had to be jumped including mine. Got in the car to a blank radio screen. Won't come on for nothing. Anyone know a fix to this ? Worked fine before it went into the shop , was it the jump start that caused it ? The anti theft system ? Low battery ? Please help. Thank you it's a 2017 Chevy equinox LS .