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TESSA Service Report
Report #SR-00412 · Technician: Marcus Rivera
Philips Healthcare
IntelliVue MX800
US41902847
BIO-ICU-0283
Corrective Action
Replaced LCD display assembly and ribbon cable connector, updated firmware to v4.2.01, and recalibrated all alarm thresholds per ICU protocol.
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TESSA Service Report
Report #SR-00412 · Generated: March 28, 2026, 2:34 PM
Technician: Marcus Rivera
Customer Information
St. Mary's Regional Hospital
Main Campus - Building A
ICU - 3rd Floor
(512) 555-0147
Device Information
Philips Healthcare
IntelliVue MX800
Patient Monitor
US41902847
BIO-ICU-0283
Service Summary
Performed corrective maintenance on Philips IntelliVue MX800 patient monitor in the ICU following nursing staff reports of intermittent display flickering and false critical alarm triggers during patient monitoring. Comprehensive diagnostic evaluation, component replacement, and firmware update were completed.
Issue Description
The unit exhibited intermittent LCD display flickering occurring approximately every 3–5 minutes, accompanied by sporadic false SpO2 and ECG alarm activations not correlated with patient vital signs. Visual inspection revealed hairline fractures on the LCD ribbon cable connector. Firmware version 3.1.02 was found to be outdated with known alarm logic bugs documented in Philips service bulletin SB-2025-MX-041.
Corrective Action
Replaced LCD display assembly (P/N 453564243021) and ribbon cable connector. Updated system firmware from v3.1.02 to v4.2.01 per Philips service bulletin SB-2025-MX-041 to resolve known false alarm trigger conditions. Performed full system calibration including SpO2 sensor verification, ECG lead validation, NIBP accuracy check, and alarm threshold reconfiguration per ICU clinical protocols. Cleaned all external connectors and verified cable integrity.
Outcome / Test Results
Post-repair functional verification completed successfully. Display operated without flickering over a 45-minute continuous monitoring test. All alarm parameters responded correctly to simulated threshold breaches — no false triggers observed. SpO2 accuracy within ±2% tolerance. NIBP readings within ±3 mmHg. ECG waveform fidelity confirmed across all 12 leads. Unit cleared for return to active patient monitoring.
Tags Applied
Report #SR-00412
Technician: Marcus Rivera
Generated by TESSA — Technical Equipment Support and Service Assistant
TESSA Biomed
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Guides
Field guides for biomed techs
How-to
How to use AI in a field service business (practically)
A grounded look at where AI earns its keep in field service operations right now, where it does not, and how to roll it out without breaking your documentation.
How-to
AI documentation for field service technicians: a before and after
A concrete before-and-after: the same service call documented the old way and with voice plus AI, and the habits that make the difference.
Compliance
AI service reports: accuracy, review, and who is liable
Who is accountable when an AI-drafted service report is wrong, what must be verified before signing, and how to build a review step that holds up.
Troubleshooting
Patient monitor repair: common failures and how to diagnose them
Display faults, module failures, power board issues, and network dropouts — what actually causes them on patient monitors and the order to check them in.
Troubleshooting
Defibrillator testing and repair: what BMETs check and why
Energy verification, battery and capacitor faults, AED self-test failures, and what to do when a defibrillator fails delivered-energy tolerance.
Buyer Guide
Hospital equipment repair: when to fix and when to replace
The cost, age, parts, and risk factors that decide whether a medical device gets repaired or replaced — and how to document the call so finance backs it.
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