QL-820NWB/820NWBc FAQs & Troubleshooting QL-820NWB/820NWBc Not your product? Sort by Updated Date Popularity 1 Results 1. 19/12/2019 Wi-Fi® LED is lit in blue (QL-810W) or WLAN icon appears on the LCD (QL-820NWB) but the printer cannot communicate with other devices via Wi-Fi. More FAQs (English only) Error Messages/LED Indications FAQs & Troubleshooting