BeneVision N22/N19

1. Make sure the patient is safe — swap in a backup unit if you need to.
2. Reproduce the complaint yourself and write down exactly what you see (screen, alarm, code).
3. Check power, battery, cables, accessories, and settings before ordering parts.
4. Then open the service manual above and follow its troubleshooting section.

Won't power on source ↗

• Confirm AC/battery
• Power-supply protection: remove AC and batteries, wait >15 s, restart
• Check power switch & LED board → front housing interface board → main-control coaxial cable, and power module → DCDC board cables (handle coax carefully)
• Replace power switch & LED board, power module, then motherboard

Blank main screen while running source ↗

• Check same interface/coax cables
• Replace LCD

Secondary display dead source ↗

• Check DP1 connector/cable
• If DP cable was hot-plugged, restart main unit
• Hold secondary screen power button 5 s

Touchscreen not responding / inaccurate source ↗

• Hold Main Menu QuickKey >3 s if touch is disabled
• Check touchscreen → touch control board → front housing interface board → main board cables
• Recalibrate touchscreen

SMR rack: power LED on but modules not recognized source ↗

• Restart (module rack was hot-plugged)
• Check SMR cable and contact screws
• Swap module to test; then rack interface board, 8-slot comm board, DCDC board

No audible alarm though alarm LED works source ↗

• Main Menu → System → Maintenance (password) → Alarm: set Minimum Alarm Volume; then Alarm → Setup volume
• Check speaker cable; replace speaker/main board

No nurse call / analog output source ↗

• Main Menu → Analog Output Setup → Analog Output On
• Check DCDC interface board cable

USB devices not working source ↗

• Restart (USB enumeration)
• Check USB Hub board cable; replace hub board

Battery won't charge source ↗

• Swap in known-good battery and charge fully
• Check battery interface board → power module cable; DCDC interface board

Leads off / no signal (telemetry) source ↗

• Re-attach ECG leads
• Confirm transmitter is in coverage and batteries are good