DDJ-SX2 Static, Glitching

DDJ-SX2 glitching / flickering / static when on Deck 2 playing turntable through Serato. 

this only happens on channel 2. when turntable spinning you can tell minor flickers. when turntable stopped then a good amount of static and censor light flashes sporadically (definitely not in a regular beeping type of fashion). Play and Cue button lights also flicker with the Censor light. 

channels 1,3,4 working fine. channel 2 actually working fine when set to Internal. 

you can see the issue on my video here: 

https://photos.app.goo.gl/gHroWA3kwj4DyMq5A

all computer and board software are current. 

would love some assistance

thanks community !