DJM900-NXS abruptly shutting off

I've been experiencing this problem for a while and no one in my area can remedy the situation or fix it, so hoping someone here can help me.

My DJM900-NXS abruptly pops and shuts off. I'm running two CDJ3000s, but it happened when I'd use XDJ700s as well, so it doesn't seem to be any particular units causing the issue. I've been told the fuse looks fine as it's built in anyway. It also happens without any headphones plugged in, so it isn't the protective headphone circuit issue either. Updating the software to the latest version slightly improved the situation (it turns back on quicker automatically after shutting off), but when I'm playing two tracks with the trims above "over", there's a very good chance it will still pop and shut off.

Is anyone else having a similar issue with this mixer, or know how to fix this? I'm not an electrician so it's very hard to diagnose the exact issue and no one in my small town seems to know enough about it to give me a proper answer.