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

🧰 Common checks for Patient Monitors (1)

Leads off / no signal (telemetry) source ↗

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

📞 Still stuck? Call Nihon Kohden

Contact Nihon Kohden US

Retried 2026-10-21: us.nihonkohden.com /contact/ and /support/ show only a form, and newserver-us.nkusa.com timed out (504). Search cites 1-800-325-0283 but it is unconfirmed, so left null.

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