ps4 randomly shut off during gameplay?

I was playing killzone a few days ago and I had one of the headphones in and I heard about 2 to 3 beeps that were about 10 seconds apart. Then the ps4 shut down. Then rebooted into safe mode. The fix I found online said to change the resolution to 480p so I did then changed it back. I alsoalso changed the rgb and the ycb whatever the second one is to limited and haven't had an issue since others hsve said it could be a display issue with the hdmi or the setting with 2 display settings i mention.Has anyone else experienced this before