Troubleshooting
9 min read
Barcode Scanner Won’t Scan Phone Screens: Safe Fixes
Use a paper control code to separate scanner capability, phone presentation, and POS data-path problems before resetting or replacing hardware.
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Scanners, inventory workflows, SKU labeling, and stock-counting systems.
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Receipt printers, label printers, thermal media, drivers, and replacement planning.
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Routers, failover, backup power, Wi-Fi coverage, and business continuity gear.
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Troubleshooting
Fixes for printer pairing, scanner setup, network drops, and hardware compatibility issues.
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Troubleshooting
8 min read
Receipt Printer Printing Gibberish? Diagnose the Data Path
Use a self-test-first sequence to isolate random receipt output across the printer, driver, POS profile, connection, and encoding.
Troubleshooting
8 min read
Square Cash Drawer Not Opening: Diagnose the Fault
Separate mechanical, USB, printer-driven, and profile failures before resetting Square hardware or replacing a working cash drawer.
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Troubleshooting
Barcode Scanner Won’t Scan Phone Screens: Safe Fixes
Use a paper control code to separate scanner capability, phone presentation, and POS data-path problems before resetting or replacing hardware.
Troubleshooting
Receipt Printer Printing Gibberish? Diagnose the Data Path
Use a self-test-first sequence to isolate random receipt output across the printer, driver, POS profile, connection, and encoding.
Troubleshooting
Square Cash Drawer Not Opening: Diagnose the Fault
Separate mechanical, USB, printer-driven, and profile failures before resetting Square hardware or replacing a working cash drawer.
Troubleshooting
Barcode Scanner Scanning Wrong Characters: Safe Fixes
Use one controlled scan to isolate keyboard layout, prefixes, interface mode, timing, and catalog formatting before resetting the scanner.
Troubleshooting
Receipt Printer Printing Faded? Diagnose the Pattern
Use the receipt pattern, a self-test, and known-good paper to separate media, contamination, settings, contact, heat, and hardware faults.
Networking & Uptime
Internet Failover for POS Systems: A Safer Setup
Build a POS internet backup that preserves the local checkout network, switches paths automatically, and survives a controlled outage test.
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