Help! High frequency noise/buzz across all presets

Hi everyone, I'm in need of serious help thats killing my recording process right now. Running an Axe FX II XL, I'm suddenly hearing a buzzing/high frequency noise on every note played across presets and guitars. Noise gates don't help, and I noticed that the only way to lessen the issue is by cutting the high frequencies in the amps of my presets (6k and 8k) down, but then I lose serious quality in my tone. This did not happen a few months ago, so I'm worried that something in the axe fx is...

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