Patient monitors · DINAMAP family

GE Healthcare DINAMAP PRO 100-400V2: troubleshooting and error codes

The ServiceForge knowledge base holds 35 documented symptoms for the GE Healthcare DINAMAP PRO 100-400V2, with 53 ranked causes, 27 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

System error P105, P110, or P115 displayed after power-up patient safety

Fail-safe alarm sounds during monitor power-up sequence; one of system error messages appears (P105, P110, or P115).

Ranked causes

1. Failed SpO2 sensor or cable (common)
2. SpO2 PWA faulty (occasional)
3. Isolated +5 VDC power supply out of specification (occasional)
4. Main board fault (occasional)

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

Illegible or no LCD display

LCD screen shows garbled text, blank, or unreadable content.

Ranked causes

1. LCD failure (common)
2. Main board fault (usually with audible alarm) (occasional)
3. Negative supply to LCD (-9.6 VDC) out of tolerance (occasional)

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

Overpressure warnings displayed when NIBP initialized

Monitor shows overpressure error message when NIBP measurement starts; occurs with or without cuff and hose.

Ranked causes

1. Occluded air hose or cuff (common)
2. Partial or full blockage of internal pneumatic tubing (occasional)
3. Valve assembly faulty (occasional)

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

Pump sounds labored at NIBP start with inflation timeout or overpressure messages

NIBP pump produces labored sound during initialization; N33 (Inflation Timeout) or N00 (Overpressure) error messages appear.

Ranked causes

1. Reversed connections on pneumatic assembly failure (common)
2. Blocked or kinked hose from pump output (common)
3. Pneumatic assembly failure (occasional)

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

External DC power or battery charging failure

Monitor does not charge battery when external power connected; external power indicator flashes instead of glowing continuously

Ranked causes

1. Battery not installed (occasional)
2. External DC input voltage too low (occasional)

First check

Verify battery is installed

Test point: Battery compartment
Expected: Battery present and properly seated

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

External power LED flashes instead of steady glow

External power indicator LED flashes every four seconds instead of continuously glowing green

Ranked causes

1. Battery not installed (common)
2. External DC input voltage too low (common)

First check

Verify battery installation

Test point: Battery compartment
Expected: Battery present and properly seated

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

Incorrect, missing segments, or no LED display output

LED displays show missing segments, garbled characters, or no output at all.

Ranked causes

1. Main board fault (usually with audible alarm) (common)
2. No or low +4 VDC LED supply (occasional)

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

Monitor will not switch on when powered by battery

Monitor does not power on when battery is installed; no LED or display activity.

Ranked causes

1. Battery may be discharged (common)
2. PSU board fault (occasional)

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

No LCD backlight

LCD screen is completely dark with no illumination; display content not visible.

Ranked causes

1. LCD faulty (common)
2. Main board fault (occasional)

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

Pump Over Current condition detected caution

Error message 'Pump Over Current 0, (code line failure), 0, 0' displayed; pump drawing excessive current.

Ranked causes

1. Pump over-current condition signaled to main board (common)
2. Pump failure (occasional)

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

SpO2 probe disconnected error displayed patient safety

Monitor displays 'SpO2 probe disconnected' error message; SpO2 measurement unavailable.

Ranked causes

1. Faulty probe (common)
2. SpO2 PWA failed (occasional)

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

Unit does not respond to host communications

Monitor does not communicate with external host system or interface; no data exchange.

Ranked causes

1. PSU board unresponsive (common)
2. Broken continuity of PSU board to host comm port cable (occasional)

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

Unit will not switch on from battery or AC; no AC mains light

Monitor does not power on from either battery or external AC source; AC power indicator LED is dark.

Ranked causes

1. Locked processor (common)
2. PSU Module fault (occasional)

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

Battery LED flashes and battery icon changes on LCD

Battery LED flashes every four seconds and battery icon on LCD changes state; indicates low battery power

Ranked causes

1. Battery power depleted or battery nearing end of life (common)

First check

Reconnect external power supply

Test point: AC/DC power input
Expected: Battery LED becomes off; battery charges

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

Battery LED off when battery connected and external power disconnected

Battery LED does not glow yellow or battery icon does not appear on LCD after battery installation and external power removal

Ranked causes

1. Battery not properly installed or defective (unknown)

First check

Verify battery installation

Test point: Battery compartment
Expected: Battery LED glows yellow; battery icon appears and toggles with time indicator on LCD

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

Battery not charging or not holding charge

Battery fails to charge or rapidly loses charge after charging; does not maintain power level.

Ranked causes

1. PSU PWA battery charging function faulty (common)

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

Battery will not hold charge

Battery repeatedly fails to maintain charge even after full charging cycles

Ranked causes

1. Battery end-of-life; depleted storage battery (common)

First check

Verify battery has been fully charged

Test point: Battery LED and LCD battery icon
Expected: Battery LED off; battery icon stable on LCD (not flashing)

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

Calibration: NIBP pressure

Monitor enters service mode on power-up if NIBP system is uncalibrated; requires recalibration procedure

Ranked causes

1. NIBP system uncalibrated (common)

First check

Observe power-up self-test sequence

Test point: LCD display
Expected: Software version displayed in inverted format (white on black)

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

Calibration: NIBP system patient safety

Check and calibrate blood pressure transducers (PT1, PT2) and overpressure circuitry via Service Mode menu

Ranked causes

1. Routine NIBP calibration maintenance (common)

First check

Connect Digital Pressure Gauge to NIBP system

Test point: NIBP connector
Expected: Gauge reads 0-375 mmHg with 0.2% accuracy
Tools: Digital Pressure Gauge 0-375 mmHg (Digitron P200L or similar)

4 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: SpO2 system check patient safety

Verify SpO2 sensor integrity and algorithm response for Nellcor or Masimo equipped monitors

Ranked causes

1. SpO2 simulator settings cause algorithm to miss pulse rate (occasional)

First check

Set up Nellcor SpO2 simulator test

Test point: SpO2 connector
Expected: Monitor displays detected pulse rate and saturation
Tools: NELLCOR SpO2 Simulator Model BIO-TEK INDEX 2 MF or SRC-MAX Portable Tester

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

LCD display or backlight malfunction

LCD pixels do not illuminate or backlight does not power on during initialization

Ranked causes

1. LCD or backlight circuit failure (unknown)

First check

Observe LCD and backlight during power-up in dimly lit room

Test point: LCD display
Expected: All pixels light momentarily; backlight powered; software version displayed inverted (white on black)

LCD display or backlight not functioning at power-up

LCD does not display software version in inverted format or backlight does not power during initialization

Ranked causes

1. LCD or backlight module failure (unknown)

First check

Observe LCD display during power-up in dimly lit room

Test point: LCD display and backlight
Expected: All pixels lit momentarily; software version displayed in inverted format (white on black); backlight powers on

LED display malfunction

LED digits do not illuminate properly during power-up self-test sequence

Ranked causes

1. LED display failure or connection issue (unknown)

First check

Verify LED segment illumination during power-up

Test point: LED digit display
Expected: All seven segments illuminate in sequence beginning with upper left segment

LED display segments not illuminated during power-up

Seven-segment LED digits fail to light or do not illuminate in proper sequence during initialization

Ranked causes

1. LED display failure or internal connection issue (unknown)

First check

Observe LED display segment illumination during power-up

Test point: LED display digits
Expected: All seven segments light in sequence beginning with upper left segment

Mains power switching failure high voltage

Monitor will not switch from battery power to mains power when plugged into AC power source; remains on battery only

Ranked causes

1. Open mains fuse on AC mains converter board (common)

First check

Confirm mains fuse is open

Test point: AC mains converter board
Expected: Fuse element not visible or resistance reads open (infinite ohms)
Tools: Ohmmeter or multimeter

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

Monitor does not change from battery to mains power

Unit fails to switch to mains power when plugged into AC source; remains on battery power

Ranked causes

1. Mains fuse blown (non-serviceable) (common)

First check

Verify unit operation with mains power only

Test point: AC power input
Expected: Unit operates

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

Monitor will not retain date and time

Date and time settings reset after power cycle; monitor does not keep time when powered off.

Ranked causes

1. Backup battery low or disconnected (common)

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

No rotor selection or menu skips

Menu navigation does not respond to rotor input; menu items skip or do not advance.

Ranked causes

1. Main board failure (common)

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

Pneumatic system contamination caution

Foreign substances or moisture introduced into pneumatic system causing calibration errors or measurement failures

Ranked causes

1. Improper cleaning or immersion of hoses, cuffs, or equipment (occasional)

First check

Inspect pneumatic hoses and cuff connectors for moisture or debris

Test point: Hose interior and connection points
Expected: Hoses and connectors dry and free of visible contamination

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

Pressing rotor fails to power on unit; menu selection possible

Power button (rotor) does not activate unit; menu navigation works but unit remains in low-power state.

Ranked causes

1. Rotor ON/OFF switch malfunction (common)

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

Remote alarm switch does not change state at power-up

Remote alarm switching accessory fails to clear alarm state or does not respond to monitor power cycles

Ranked causes

1. Remote alarm switch module failure or communication link issue (unknown)

First check

Observe remote alarm switch state during monitor power-up and power-down

Test point: Remote alarm switch accessory
Expected: Alarm state when monitor is off; clears during monitor power-up

Remote alarm switch malfunction

Remote alarm switch does not change states during power-up initialization

Ranked causes

1. Remote alarm switch hardware failure (unknown)

First check

Verify remote alarm state changes during power-up

Test point: Remote alarm switch
Expected: Alarm state clears when Monitor powers up (transitions from alarm state to normal state)

Speaker audio distortion or no sound

Speaker produces distorted audio or fails to produce sound during power-up self-test

Ranked causes

1. Speaker failure or audio circuit malfunction (unknown)

First check

Listen to speaker output during power-up

Test point: Speaker output
Expected: Three short beeps followed by brief pause then three more beeps

Speaker generates distorted or no sound at power-up

Audio system produces distorted sounds or is silent during three-beep startup sequence

Ranked causes

1. Speaker unit failure or audio amplifier malfunction (unknown)

First check

Observe audio output during power-up sequence

Test point: Speaker output
Expected: Three short beeps followed by brief pause, then three more beeps; clear undistorted sound

TSH_HW:PIC displayed on main LCD

Message 'TSH_HW:PIC' appears on monitor LCD indicating temperature self-calibration failure.

Ranked causes

1. Monitor has failed temperature self-calibration (common)

1 corrective action and part numbers 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.