Troubleshooting
Diagnosis and fixes for real printing errors.
Browser Printing
troubleshooting
Browser Blocks Printing
Troubleshoot blocked browser printing caused by missing user activation, pop-up behavior, sandboxed frames, permissions policy, or enterprise controls.
troubleshooting
Browser Print Dialog Always Opens
Understand why the browser print dialog opens and choose a safe printing path when a workflow requires unattended output.
ESC/POS
troubleshooting
Barcode Not Printing
Diagnose missing or unreadable printed barcodes by checking symbology, data rules, ESC/POS commands, dimensions, quiet zones, and media.
troubleshooting
ESC/POS Characters Are Broken
Fix accented, currency, and non-Latin characters by aligning Unicode conversion, printer code pages, fonts, and ESC/POS selection commands.
troubleshooting
Receipt Paper Cuts Too Early
Fix early receipt cuts caused by embedded commands, partial jobs, incorrect length fields, asynchronous writes, or premature finalization.
troubleshooting
Receipt Paper Never Cuts
Troubleshoot missing receipt cuts across hardware capability, ESC/POS commands, driver settings, feed distance, job truncation, and cutter faults.
troubleshooting
Printer Prints Gibberish
Fix unreadable printer output caused by the wrong command language, raw-versus-driver mismatch, encoding, transport, or corrupted bytes.
troubleshooting
QR Code Not Printing
Troubleshoot missing or unreadable QR codes across ESC/POS support, command sequence, data length, image rendering, size, and media quality.
Printing Infrastructure
troubleshooting
Network Printer Offline
Restore an offline network printer by checking device state, addressing, connectivity, ports, queues, SNMP status, and safe job recovery.
troubleshooting
Print Permission Denied
Resolve print authorization failures across application roles, origin pairing, runtime permissions, operating-system access, and network printers.
troubleshooting
Printer Not Found
Troubleshoot a missing printer across power, connection, operating-system queues, drivers, runtime discovery, identity, and permissions.
troubleshooting
Printer Prints Blank Pages
Find blank-print causes in HTML/CSS, page sizing, images, drivers, thermal media, command language, and application data.
troubleshooting
Printing Runtime Disconnected
Recover from a disconnected local printing runtime without losing jobs or creating duplicate receipts and labels.
troubleshooting
Unable to Connect to Localhost Printing
Diagnose browser-to-local-runtime connection failures involving process state, address, TLS, ports, origin policy, and endpoint security.
troubleshooting
Windows Print Spooler Stopped
Diagnose a stopped Windows Print Spooler, protect pending jobs, identify driver or queue failures, and restore service safely.