Bizarre Beeping, keyboard flashing, and screen dimming and brightening

Yaddie

Hello all,

This is my first time here and I have been searching to see if this has happened before to no avail. I own a Predator Helios 300 (PH 315-51). I've been playing games on it intermittently for about a year now with no troubles. Temps were pretty hot when I got it, I have since undervolted it with Throttle Stop with some success and just run most games on lower settings as not to push the machine too hard. Recently, I purchased Total War WARHAMMER II, strangely, upon opening the campaign map my screen dims, keyboard lights blink off, and a beep is emitted. This happens about every second until I tab out of the screen. Using PredatorSense I can see my GPU spiking from 5% to 95% and back again concurrently with the strange beeping, flashing, dimming. I have absolutely no idea what could be causing this.

I am a casual user with limited computer knowledge, so if there is more information you need from me I will attempt to provide it.