Radical-7

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.

Low SIQ / dimly lit parameters source ↗

• Verify sensor type and size; reapply or move site
• Check for restricted blood flow; reduce motion
• Set sensitivity to MAX; replace sensor

Readings dashed or difficult to obtain source ↗

• Allow time to stabilize; confirm the device and sensor are licensed/configured for the parameter
• Shield from strobe light; set the 50/60 Hz Localization menu
• Dock the handheld and confirm the dock power light is on

Unexpected SpCO or values that don't match ABG source ↗

• Reposition to a strong SIQ/Pi site and average three sites
• Send a lab CO-oximetry sample (elevated MetHb can raise SpCO)

Won't turn on / blank screen source ↗

• Charge the battery; check and replace the fuses
• Adjust brightness; otherwise contact Masimo service

System failure technical alarm (continuous tone) source ↗

• Silence; if it continues, power off and remove the handheld battery
• Contact Masimo service

Speaker silent / touchscreen unresponsive source ↗

• Check All Mute, volumes and a muffled speaker; power cycle
• Touch issues: check AC ground and move away from EMI sources

Battery short run time or not charging source ↗

• Confirm the dock AC cable is connected
• Replace the battery

Cable or sensor not detected source ↗

• Reseat the connector fully
• Replace an expired or damaged cable or sensor; power cycle

Leads off / no signal (telemetry) source ↗

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