Help! Urgent support needed

Hello,

DDJ SX3 on Windows with Serato Pro

I have a huge gig coming up Saturday. I was practicing today when I heard a super loud noise going through my speakers.

Now the controller won't connect to Serato. Most of the lights on the controller are off, but the "B" library button is flashing, which it's normally lit on "A" and USB is plugged into the "A" port. This makes me think it's an error message perhaps?

Anyway, I'm screwed as I have a huge gig on Saturday and no way to fix this. If anyone can help, I would be most appreciative.

Thanks!