Hi. I bought a used 2018 Chevy equinox just over a year ago. Not to long ago I started the car and the screen wouldn't turn on. It would show the reverse camera and then go blank again. Turn signals would work but couldn't hear them. The red light goes on by the OnStar button. It happens quite often and randomly. I found that having the door open and holding the power button on the screen gets it working but there is not set time to hold the power button or how many times I have to try it first. Any thoughts?