Patient monitors · IntelliVue family

Philips IntelliVue MP20: troubleshooting and error codes

The ServiceForge knowledge base holds 83 documented symptoms for the Philips IntelliVue MP20, with 164 ranked causes, 30 diagnostic checks with test points and expected values, and 20 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Integrated display is blank or brightness reduced

Screen is blank or has reduced brightness, possibly due to overheating from high room temperature or nearby instruments

Ranked causes

1. Display overheating from room temperature or nearby instruments (common)
2. Flat Panel Adapter flex not connected (occasional)
3. Backlight Inverter Cable not connected (occasional)
4. Backlight tubes defective (occasional)
5. Backlight Inverter board defective (rare)
6. Flat Panel Adapter flex defective (rare)
7. LCD Flat panel defective (rare)
8. Main board defective (rare)

First check

Verify room temperature and monitor environment

Test point: ambient environment
Expected: not exceeding 40°C or below 5°C
Tools: thermometer

8 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

External Touch Screen not functioning

External touchscreen device does not respond to user input

Ranked causes

1. Touchscreen functionality temporarily disabled (common)
2. Touchscreen functionality permanently disabled (occasional)
3. External Touch cable not connected (occasional)
4. External Touch driver configuration issue (occasional)
5. MIB Board defective (rare)
6. External touch defective (rare)
7. Main board defective (rare)

7 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Power On LED and Error LED remain off after power button pressed caution

Both green Power On LED and red Error LED do not illuminate when the power button is pressed

Ranked causes

1. Remote devices interfering with boot (common)
2. Power Switch Micro Controller hung (common)
3. Carrier Power on LED PCA not connected (occasional)
4. I/O Board defective (occasional)
5. Touch controller, flex adapter, MSL board, recorder PCA, battery PCA, or IIT module defective (occasional)
6. Carrier Power on LED PCA defective (rare)
7. Main Board defective (rare)

7 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Touch Screen not functioning

Touchscreen does not respond to user input

Ranked causes

1. Touchscreen functionality temporarily disabled (common)
2. Touchscreen functionality permanently disabled (occasional)
3. HIF PCA not connected (occasional)
4. Touch panel cable not connected (occasional)
5. HIF PCA or touch sensor defective (rare)
6. Main board defective (rare)

6 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

AC Power LED does not light up caution

Green AC power indicator does not illuminate when monitor is powered with AC connection

Ranked causes

1. AC mains not powered or power cord disconnected (common)
2. Carrier Power on LED PCA not connected (occasional)
3. Carrier Power on LED PCA defective (occasional)
4. Main Board defective (rare)
5. Power supply defective (rare)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

External Display is blank

Slave external monitor shows no image

Ranked causes

1. Video cable to external display not connected or defective (common)
2. External display has no power (common)
3. External display is defective (occasional)
4. System Interface board defective (rare)
5. Main board defective (rare)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Red Error LED stays on continuously caution

Red Error LED remains illuminated without blinking during operation

Ranked causes

1. External connected device defective (common)
2. I/O Board defective (occasional)
3. Touch controller, flex adapter, MSL board, recorder PCA, battery PCA, or IIT module defective (occasional)
4. Measurement Server Mount defective (rare)
5. Main Board defective (rare)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Remote input device not functioning

Mouse or keyboard attached to Remote Extension Device does not respond

Ranked causes

1. Remote Extension Device not connected to monitor (common)
2. Input Device not connected properly (occasional)
3. Input Device defective (occasional)
4. Remote Extension Device defective (rare)
5. Remote Device I/O board defective (rare)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

SpeedPoint not functioning

SpeedPoint attached to Remote Extension Box does not respond

Ranked causes

1. Remote Extension Device not connected to monitor (common)
2. SpeedPoint not connected properly (occasional)
3. SpeedPoint defective (occasional)
4. Remote Extension Device defective (rare)
5. Remote Device I/O board defective (rare)

5 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm does not sound patient safety

Alarm occurs but no alarm sound is issued from speaker

Ranked causes

1. Audible alarm indicators switched off (common)
2. Volume set to zero (common)
3. Speaker defective (occasional)
4. Sound amplifier on main board defective (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm on screen but no LED or sound on alarm device patient safety

Screen displays alarm but Remote Alarm Device produces no LED or audio indication

Ranked causes

1. Cabling not connected (common)
2. Cabling defective (occasional)
3. I/O board defective (occasional)
4. Remote Alarm Device defective (rare)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Keyboard/Mouse on Remote Extension Box not functioning

Keyboard or mouse connected to Remote Extension Box does not respond

Ranked causes

1. Remote Extension Box not connected or input device disconnected (common)
2. Keyboard/Mouse defective (occasional)
3. Remote Extension Device defective (rare)
4. Remote Device I/O board defective (rare)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Monitor in docking station has AC Power but network connection could not be established

Monitor powered via docking station but LAN connection fails

Ranked causes

1. Docking interface board not installed in monitor (common)
2. LAN cable not connected or defective (common)
3. Flex cable in docking station not connected properly or defective (occasional)
4. Docking Station main board defective (rare)

First check

Verify docking interface board installation in monitor

Test point: Monitor internal docking connector
Expected: Docking interface board present and seated

2 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Frequent wireless dropouts and network disconnects patient safety

Monitor frequently loses connection to wireless network

Ranked causes

1. Excessive interference from other radio equipment or microwave (common)
2. System capacity exceeded in coverage area (occasional)
3. Access point configuration problem (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

INOP Message MsmtSrv not Supp issued caution

INOP message displayed: MsmtSrv not Supp

Ranked causes

1. Wrong software revision compatibility (common)
2. Too many measurement servers connected (occasional)
3. Unsupported type of measurement server (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

INOP Unsupported LAN issued

INOP message issued with network icon displayed

Ranked causes

1. Network infrastructure failure (common)
2. Monitor connected to wrong network (occasional)
3. IP address conflict after infrastructure re-installation (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Keyboard/Mouse not functioning

Keyboard or mouse attached directly to monitor does not respond

Ranked causes

1. Keyboard/Mouse not connected properly (common)
2. Keyboard/Mouse defective (occasional)
3. PS/2 I/O Board defective (rare)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Measurement Server configuration not supported caution

Prompt message: Measurement Server Configuration not supported

Ranked causes

1. Unsupported Measurement Server Extension connected (common)
2. Measurement Server Extension defective (occasional)
3. Measurement Server defective (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Monitor does not boot or constantly reboots but functions properly outside docking station caution

Monitor fails to boot or reboots repeatedly when docked; operates normally when undocked

Ranked causes

1. Flex cable in docking station not connected properly or defective (common)
2. Docking Connector soiled or blocked (common)
3. Docking Station main board defective (occasional)

First check

Check flex cable connection in docking station

Test point: Flex cable connector
Expected: Cable connected and secured

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

AC LED on Docking Station does not light up caution

AC indicator LED on docking station is off

Ranked causes

1. AC connection not ok (common)
2. Docking Station or Docking System Interface board defective (occasional)

First check

Verify AC mains power and power cord connection

Test point: AC mains inlet
Expected: Power present and cord properly seated

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

AC LED on Docking Station lights up but AC LED on monitor does not caution

Docking station AC LED illuminated but monitor AC LED remains off

Ranked causes

1. Monitor not docked correctly (common)
2. Docking Station defective (occasional)

First check

Verify monitor docking lever position

Test point: Docking lever
Expected: Right-hand position

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm LED does not light patient safety

Alarm occurs but no LED indicator lights up

Ranked causes

1. Environmental lighting too bright (common)
2. Main board defective (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm LEDs illuminate but no alarm sound patient safety

Remote Alarm Device shows LED indicators but produces no audible alert

Ranked causes

1. Speaker defective (common)
2. Remote device I/F defective (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Bed not being monitored at central patient safety

Monitor connected to LAN with IP address but bed not monitored at central station

Ranked causes

1. Monitor not assigned to sector (common)
2. Duplicate Equipment Label on network (common)

Measurement Server LEDs normal but does not start caution

Measurement Server LEDs are normal but device does not power up

Ranked causes

1. Communication lines broken in MSL cable or connector (common)
2. MSL connector board defective (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Navigation Point not functioning

Navigation Point device attached directly to monitor does not respond

Ranked causes

1. Navigation Point not connected properly (common)
2. Navigation Point defective (rare)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No connectivity to PIC with no error message patient safety

No prompt or error message on monitor but no connection to Philips Information Center

Ranked causes

1. Hardware defect in LAN connection (common)
2. Configuration problem (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No Network icon (IntelliVue 802.11 adapter) patient safety

No network icon or icon flashing with IntelliVue 802.11 Bedside Adapter

Ranked causes

1. Communication problem with 802.11 adapter or low RSSI (common)
2. Configuration problem in WLAN settings (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

No test sound issued during boot

Speaker does not produce expected test tone during system startup

Ranked causes

1. Speaker defective (common)
2. Main Board defective (rare)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Other Bed Overview not available

Other Bed Overview functionality not working

Ranked causes

1. Configuration problem (common)
2. Wireless configuration not supporting feature (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Poor recorder print quality

Printhead produces faint, streaky or low quality output

Ranked causes

1. Printhead dirty (common)
2. Printhead failure (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Red Error LED blinks repeatedly (cyclic reboots) caution

Red Error LED flashes repeatedly indicating recurring system reboots

Ranked causes

1. Hardware failure detected (common)
2. Software fault in operating system (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

802.11 Bedside Adapter LEDs off and remain off caution

LEDs on IntelliVue 802.11 Bedside Adapter are not illuminating

Ranked causes

1. Communication problem or cable disconnected (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm LEDs do not illuminate

Alarm indicator LEDs remain off during boot sequence or operation

Ranked causes

1. Main Board defective (rare)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Alarm sound issued but no LEDs light up

Audio alarm is heard but Remote Alarm Device LED indicators remain off

Ranked causes

1. LED failure (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Battery deeply discharged or not communicating caution

Indicator shows CHARGE BATT1 or CHARGE BATT2 with INOP tone

Ranked causes

1. Battery deeply discharged or communication failure (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Barometric pressure check

Verify measured ambient pressure matches reference barometric pressure for accurate CO2 measurement

Ranked causes

1. Measured ambient pressure differs from reference (unknown)

First check

Compare reference barometric pressure with measured ambient pressure on monitor

Test point: monitor display, reference source (airport, weather station)
Expected: difference less than 12 mmHg, <12 mmHg

Calibration: CO2 calibration verification 10%

Verify CO2 sensor accuracy using 10% calibration gas as final verification

Ranked causes

1. Measured CO2 value differs from calculated value beyond tolerance (unknown)

First check

Compare measured CO2 value to calculated value using 10% calibration gas

Test point: monitor display with 10% calibration gas applied
Expected: ±(0.07 × calculated value), ±(0.07 × calculated value)

Calibration: CO2 gas calibration check 5%

Verify CO2 sensor accuracy using 5% calibration gas

Ranked causes

1. Measured CO2 value differs from calculated value by more than 2.6 mmHg (unknown)

First check

Compare measured CO2 value to calculated value using 5% calibration gas

Test point: monitor display with calibration gas applied
Expected: 5% of ambient pressure ±2 mmHg; difference less than 2.6 mmHg, <2.6 mmHg

Calibration: CO2 pump and IR source operating time

Verify CO2 pump and IR source operating hours are within safe limits (15,000 hours continuous use) and reset counters after component replacement

Ranked causes

1. CO2 pump or IR source operating time exceeds 15,000 hours (common)

First check

Display Setup CO2 menu and observe operating time counters

Test point: Reset PumpOpTime and Reset IRSourceTime selections
Expected: less than 15,000 hours of continuous use

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Flow rate check

Verify CO2 sensor gas flow rate is within tolerance at 50.0 ml/min

Ranked causes

1. Gas flow rate differs from expected 50.0 ml/min (unknown)

First check

Measure gas flow rate through sensor

Test point: flowmeter
Expected: 50.0 ml/min ±7.5 ml/min, <7.5 ml/min difference

Calibration: Leakage check parts 1 and 2

Verify CO2 system leakage does not exceed acceptable limits on both measurement points

Ranked causes

1. Leakage exceeds acceptable rate (unknown)

First check

Measure leakage rate on part 1 using flowmeter

Test point: flowmeter
Expected: less than 4.0 ml/min, <4.0 ml/min

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Calibration: Microstream CO2

Microstream carbon dioxide module calibration procedure during preventive maintenance

Ranked causes

1. Preventive maintenance requirement (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: NBP

Non-invasive blood pressure module calibration procedure during preventive maintenance

Ranked causes

1. Preventive maintenance requirement (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Noise level check

Verify CO2 sensor noise index does not exceed acceptable threshold

Ranked causes

1. Noise index exceeds 3.0 (unknown)

First check

Observe noise index displayed on monitor

Test point: monitor display
Expected: noise index less than 3.0, <3.0

Calibration: Pump occlusion pressure check

Verify CO2 pump can generate adequate pressure during occlusion condition

Ranked causes

1. Pump pressure during occlusion below 120 mmHg (unknown)

First check

Measure pressure difference between cell and ambient during occlusion

Test point: monitor display during occlusion
Expected: greater than 120 mmHg, >120 mmHg

High battery temperature caution

Temperature indicator shows CHECK BATT TEMP with INOP tone

Ranked causes

1. Ventilation openings blocked or monitor exposed to heat (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

INOP Message CHECK INPUT DEVICES

Monitor displays INOP message indicating input device problem

Ranked causes

1. Navigation Point or other input device defective (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Installation verification: display via video output

Test sequence required when monitor is installed with external display connected to video output

Ranked causes

1. Installation of monitor with video output display (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Installation verification: Docking Station

Test sequence required when monitor is installed on a Docking Station

Ranked causes

1. Installation of monitor with Docking Station (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Installation verification: IntelliVue 802.11 Bedside Adapter

Test sequence required when monitor is installed with IntelliVue 802.11 Bedside Adapter wireless module

Ranked causes

1. Installation of monitor with 802.11 Bedside Adapter (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Installation verification: IntelliVue Instrument Telemetry

Test sequence required when monitor is installed with IntelliVue Instrument Telemetry (IIT) module

Ranked causes

1. Installation of monitor with IIT module (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Mainstream CO2 accuracy check

Verify M2501A mainstream CO2 sensor measurement accuracy using 5% calibration gas at sensor operating temperature

Ranked causes

1. Sensor measurement exceeds tolerance (rare)

First check

Attach M2501A CO2 sensor to patient monitor with airway adapter

Test point: sensor attachment point
Expected: sensor firmly attached, disconnected from patient circuit

7 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Measurement Server does not start (no LEDs) caution

Measurement Server does not start up with no LED activity and no INOP or prompt

Ranked causes

1. No power to Measurement Server (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Monitor cannot be properly docked to the docking station caution

Monitor will not dock correctly with docking station

Ranked causes

1. Docking interface board not correctly installed in the monitor (common)

First check

Verify docking interface board installation

Test point: Monitor internal docking connector
Expected: Docking interface board present and seated

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Monitor label not set patient safety

Prompt message issued: no central assigned to this bed

Ranked causes

1. Monitor label not set in monitor (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

MSL Power High INOP issued caution

INOP message: MSL Power High; if persists >15 min shows INOP MSL Power Off

Ranked causes

1. Attached devices drawing too much power (common)

Navigation Point Knob Rotation or Selection not functioning

Navigation Point knob rotation or selection control does not respond

Ranked causes

1. Navigation Point defective (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

No connectivity in multi-access point coverage area patient safety

Some parts of coverage area with multiple access points have no connectivity

Ranked causes

1. Configuration problem in access points (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

No ECG OUT signal to defibrillator high voltage

ECG OUT signal missing to defibrillator interface

Ranked causes

1. Main board defective (occasional)

First check

Test ECG OUT signal with known good defibrillator and cables

Test point: Defib connector
Expected: ECG signal present with marker pulse
Tools: Known good defibrillator, ECG cables, MMS

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

No IP address assignment
No LAN connection
No marker pulse displayed on monitor
No network icon or icon flashes (IIT adapter)
Other Bed alarms not appearing
Recorder door detected as open
Recorder shows out of paper
Remote Extension Device buttons not functioning
Repair verification: Docking Station
Repair verification: general IntelliVue system repairs
Repair verification: IIT module
Repair verification: impact damage
Repair verification: M3015A module
Repair verification: unit opened
Sidestream CO2 accuracy check
Touch position invalid
Touch position invalid (external)
Wireless adapter defective
Wireless Adapter firmware revision wrong
Wireless Adapter has no power
Wireless monitor losing connection to access point
Wireless monitor out of range of access point
Wireless overview or printing not working

23 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`BATTERIES EMPTY / BATT 1/BATT 2 EMPTY`	Estimated remaining battery-powered operating time less than 10 minutes	Battery capacity monitoring indicates critical low level	critical
`BATTERIES INCOMPAT / BATT 1/BATT 2 INCOMPAT`	Indicated batteries cannot be used with this monitor	Battery type or protocol mismatch detected	error
`BATTERIES LOW / BATT 1/BATT 2 LOW`	Estimated battery-powered operating time remaining is less than 20 minutes	Battery capacity monitoring indicates low level	warning
`BATTERIES MALF / BATT 1/BATT 2 MALFUNCTION`	Monitor cannot determine battery status or communication problem between battery and board	Battery status unknown or communication failure detected	error
`CHARGER MALFUNCT`	Problem with battery charger in monitor	Charger circuit failure detected	error
`Check Alarm Lamps`	Alarm lamp indicator circuit failure	Alarm LED indicator circuit malfunction	error
`CHECKINTERNVOLTAGE / CHECK MONITOR FUNC`	Problem with too low voltages (5V, 12V) in the monitor	Internal voltage monitoring detects insufficient voltage	error
`CHECK MONITOR TEMP`	The temperature inside the monitor is too high	Internal temperature sensor detects excessive heat	warning
`CHECK NURSE CALL RELAY`	Nurse Call Relay board failure	Nurse Call Relay I/O board malfunction	error
`CO2 EQUIP MALF`	CO2 measurement equipment malfunction	CO2 parameter module or MMS device failure	error
`CO2 OCCLUSION`	CO2 occlusion detected or pump operation time reset	Resetting the PumpOpTime counter in Setup CO2 menu	warning
`ECG EQUIP MALF`	ECG measurement equipment malfunction	ECG parameter module or MMS device failure	error
`INOP BAD SERVER LINK`	Unexpected data detected on MSL or incompatible software	Invalid data on serial link or incompatible MMS software revision	error
`MSL Power Off INOP`	Attached devices drawing too much power from monitor	Multiple MMS devices or high power device connected to monitor	error
`MSL Power Overload INOP`	Short circuit within MSL system	Electrical short detected in Multi-Measurement Server system	error
`SERVERLINK MALF`	Hardware for communicating with Multi-Measurement Server is faulty	Communication hardware failure with periodic beep every two seconds	error
`SETTINGS MALFUNCTION`	Problem during configuration cloning or corrupted settings memory	Configuration cloning process fails or settings memory corrupted	error
`SPEAKER MALFUNCTION`	Audio output system failure	Speaker, cable, or sound amplifier circuit fault	warning
`SpO2 EQUIP MALF`	SpO2 measurement equipment malfunction	SpO2 parameter module or MMS device failure	error
`SpO2 TRANSDUC MALF`	SpO2 transducer malfunction	SpO2 transducer sensor failure	error

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.