CP50

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.

No power on AC source ↗

• AC LED off: check AC fuses and source
• AC LED lit: check LCD and reseat AC-to-PSU harness

Won't run on battery source ↗

• Check battery connections, charge, replace

Frozen / keys don't respond source ↗

• Hold power ≥6 s to reset
• Reseat membrane harness; replace keypad

Blank or off-colour LCD source ↗

• Reseat LCD cable at micro compute engine board; replace LCD

All leads off / bad waveform source ↗

• Replace patient cable, reseat ECG harness, replace ECG board

Leads off / bad waveform source ↗

• Swap patient cable, then harness, then ECG board

Power/battery source ↗

• Check AC fuses; fewer than 10 reports per charge = replace battery