| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Only prints blank lines | Wrong code page | Set codepage to 858 (or 437) in driver settings | | Random data repeats every 10 prints | Seed not updating | Restart service: net stop RNDPrinterSvc && net start RNDPrinterSvc | | Printer cuts after every line | paper cut every set to 1 | Change to ≥5 | | Driver crashes on USB connect | v83 USB polling bug | Install patch rnd_usb_fix_v83a.msi or switch to serial/Ethernet | | No barcodes despite 100% probability | Font issue | In settings: Barcode engine → "Soft font" |
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