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Just picked up this MK4 today. 32,000 credits played. All original. Works as it should except the monitor was all Red. Got it home, removed the monitor, and threw it on the bench for testing. Hooked up the B&K. Got everything setup and ran through the Emissions test. Sure enough, the Green and Blue guns were dead. I performed the rejuv procedure...twice. No change. Unfortunately, the tube is a goner. So I grabbed one of the 25" TVs I had on hand and swapped the tube. Great success.
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