Xti 4000 flickering panel lights

Hi everyone, I'm new to the Forum and the new owner of 4 used xti 4000 amps. I am running all 4 amps in bridge mode, each amp runs 2 each 8 ohm speakers wired in parallel to give me a 4 ohm load. So 2 amps are fed with a dedicated 120 volt 30 amp circuit and the same for the other two amps, so whats happening when I play the amps is the display lighting on each amp starts flickering when I get the volume up hi, not clipping though. So my question is is this normal?


Thanks


I didn't find the right solution from the internet.
References: http://www.crownaudio.com/forums/index.php?/topic/5227-xti-4000-flickering-panel-lights/


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Crown is still in business, I'd contact them with your issue. I know a lot about old Tubey things.