Canon G3900 problem code 5B00 mean the waste ink counter overflow, you need to reset Canon G3900 Waste Ink Counter (clear Waste Counters). The printer will blink as follow: Orange light – 7 times. Alternatively Green (Power) and Orange. And OS show problem “SupportCode: 5B00” like this: This problem means Canon G3900 printer Waste Ink … Continue reading The best way to reset Canon G3900 code 5B00 Waste Ink Counter Error