Ultrasounds

Sonosite C1.99: troubleshooting and error codes

The ServiceForge knowledge base holds 49 documented symptoms for the Sonosite C1.99, with 100 ranked causes, 107 diagnostic checks with test points and expected values, and 4 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

No indication of power when pressing power button

Pressing power button produces no beep, no video display, and no system response

Ranked causes

1. Battery not fully inserted (common)
2. Battery not charged (common)
3. AC power connection issue (occasional)
4. AC adapter failure (occasional)
5. Main PCBA failure (occasional)

First check

Verify battery is fully inserted in system

Test point: battery compartment
Expected: Battery fully seated and locked

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

External monitor display is blank

External video output shows no image on external monitor even when connected to system

Ranked causes

1. Video format mismatch or incorrect video configuration (common)
2. External monitor cable disconnected or faulty (common)
3. External monitor failure or incorrect input selected (occasional)
4. Main PCBA video output failure (occasional)

First check

Verify system display is functioning

Test point: system display
Expected: system display shows image

7 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No indication of power when pressing ON button

Pressing power button produces no beep, LED, or display indication

Ranked causes

1. Battery not fully inserted (common)
2. Battery depleted (common)
3. AC power adapter issue (occasional)
4. Main PCBA failure (occasional)

First check

Verify battery is fully inserted

Test point: battery slot
Expected: Battery fully seated

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

System display is OK but external monitor shows no image

Internal system display functions properly but external video output is not reaching external monitor

Ranked causes

1. External monitor cable disconnected or faulty connection (common)
2. Video format incompatibility between system and monitor (occasional)
3. External monitor failure or powered off (occasional)
4. Main PCBA video output connector failure (rare)

First check

Verify external monitor cable is fully connected to system video connector

Test point: external video connector on system
Expected: cable seated firmly with no looseness

6 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

System does not operate or battery runtime is insufficient

System fails to power on or does not run for expected duration on battery charge

Ranked causes

1. Battery not fully charged (common)
2. Battery not fully inserted (common)
3. AC adapter failure (occasional)
4. Main PCBA failure (occasional)

First check

Verify battery is fully inserted in system

Test point: battery compartment
Expected: Battery fully seated and locked

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

Trackball cursor does not move

Trackball input does not produce cursor movement on display

Ranked causes

1. Trackball is dirty or stuck (common)
2. Trackball mechanism failure (occasional)
3. Control panel failure (occasional)
4. Main PCBA failure (rare)

First check

Clean trackball assembly

Test point: trackball mechanism
Expected: Cursor moves when trackball is moved

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

Trackball does not move cursor

Trackball movement does not control cursor on display or cursor movement is erratic

Ranked causes

1. Trackball contamination or wear (common)
2. Trackball mechanism failure (occasional)
3. Control panel failure (occasional)
4. Main PCBA failure (rare)

First check

Test trackball movement and keyboard response

Test point: Trackball and keyboard
Expected: Keyboard functions properly and trackball moves cursor

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

Trackball not moving cursor

Trackball does not respond to movement or cursor remains stationary

Ranked causes

1. Trackball contamination or debris (common)
2. Trackball mechanical failure (occasional)
3. Control panel failure (occasional)
4. Main PCBA failure (rare)

First check

Verify keyboard functionality first

Test point: keyboard
Expected: keyboard keys respond normally

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

Battery does not power system or operates for less than expected duration

System fails to operate on battery power or battery charge depletes faster than normal

Ranked causes

1. Battery depleted or not fully charged (common)
2. AC adapter not supplying adequate power to charge battery (occasional)
3. Main PCBA power distribution failure (rare)

First check

Verify battery is fully inserted before attempting power on

Test point: battery slot
Expected: battery seated completely with no movement

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

External monitor display is blank

External monitor connected to system shows no image

Ranked causes

1. Video cable disconnected or faulty (common)
2. Main PCBA failure (occasional)
3. External monitor failure (occasional)

First check

Check external monitor cable connection

Test point: external monitor cable connector
Expected: Cable firmly connected

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

System does not power on

No indication of power when ON button is pressed; no beeps or video display

Ranked causes

1. Battery not fully inserted or depleted (common)
2. AC adapter failure or AC power not available (occasional)
3. Main PCBA failure (occasional)

First check

Verify battery is fully inserted

Test point: battery slot
Expected: battery clicks into place with no gap

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

System works on AC power but not on battery

System operates normally when connected to AC adapter but fails or shuts down when running on battery power alone

Ranked causes

1. Battery depleted or not fully charged (common)
2. Battery connector loose or corroded (occasional)
3. Main PCBA power distribution to battery circuit failure (rare)

First check

Verify AC power operation is normal

Test point: AC adapter and system operation
Expected: system powers on and runs normally on AC

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

System works on battery but not on AC power

System operates normally when powered by battery but fails when AC adapter is connected or used exclusively

Ranked causes

1. AC adapter failure or insufficient power output (common)
2. AC power outlet not functional or AC wiring issue (occasional)
3. Main PCBA power input circuit failure (rare)

First check

Verify system works on battery power initially

Test point: battery power
Expected: system powers on and operates normally

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

Trackball does not move cursor

Trackball operation does not produce cursor movement

Ranked causes

1. Trackball requires cleaning (common)
2. Trackball failure (occasional)
3. Control panel failure (occasional)

First check

Clean trackball

Test point: trackball mechanism
Expected: Trackball operates smoothly and moves cursor

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

Trackball movement is erratic

Trackball cursor movement is irregular, jumpy, or does not track properly

Ranked causes

1. Trackball is dirty (common)
2. Control panel failure (occasional)
3. Main PCBA failure (rare)

First check

Clean trackball

Test point: trackball assembly
Expected: Smooth, accurate cursor movement

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

Artifacts visible on LCD screen patient safety

LCD screen displays artifacts either within the clinical image or outside the clinical image area, indicative of hardware and/or software errors

Ranked causes

1. Hardware error (unknown)
2. Software error (unknown)

First check

Visually inspect LCD screen for artifacts during operation

Test point: LCD screen clinical image and area outside clinical image
Expected: No artifacts visible in clinical image or surrounding area

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

Control panel key not responding

Individual keyboard keys do not respond when pressed or pressed keys show no effect

Ranked causes

1. Control panel failure or stuck key (common)
2. LED burned out (occasional)

First check

Go to patient information screen and press each individual key

Test point: keyboard keys
Expected: each key responds to press input

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

Control panel key not working

One or more keys on control panel do not respond to presses

Ranked causes

1. Control panel failure (common)
2. Main PCBA failure (occasional)

First check

Press each key on keyboard and note response

Test point: control panel keyboard
Expected: All keys respond appropriately

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

Control panel keys not responding

Keyboard function keys do not respond or respond incorrectly when pressed

Ranked causes

1. Control panel failure (common)
2. Main PCBA failure (occasional)

First check

Press each key on keyboard and note response

Test point: All keyboard keys
Expected: All keys respond correctly to presses

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

Main PCBA assert code displayed

Assert code appears on display with maintenance icon, indicating main board diagnostic failure

Ranked causes

1. Main PCBA firmware or hardware fault (unknown)
2. Main PCBA hardware failure requiring replacement (occasional)

First check

Record the assert code displayed on screen

Test point: display screen
Expected: assert code clearly visible with maintenance icon

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

Main PCBA failure with assert code

System displays assert code and maintenance icon on screen, indicating main circuit board fault

Ranked causes

1. Main PCBA fault detected (common)
2. Transient fault cleared by power cycle (occasional)

First check

Note assert code and maintenance icon displayed

Test point: System display screen
Expected: Assert code visible on screen with maintenance icon

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

No display on external video monitor

External video output not visible on connected video monitor or different from system display

Ranked causes

1. Video cable not connected properly to video connector (common)
2. Video output failure or mismatch (unknown)

First check

Verify external video monitor displays same image as system display

Test point: Video output at video receptacle
Expected: Video on external monitor matches system display

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

System software upgrade needed

Transducer contains required or optional software upgrades; system prompts user with upgrade message upon connection and power-on

Ranked causes

1. Transducer contains required software upgrade (common)
2. Transducer contains optional software upgrade (common)

First check

Connect transducer with new software and turn system on

Test point: System display
Expected: Message 'Do you want to upgrade the system software?' displays

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

System software upgrade optional

Transducer with optional software upgrade connected. Operator may choose to install or defer upgrade.

Ranked causes

1. Transducer contains optional software upgrade (occasional)
2. Operator chooses to defer optional upgrade (occasional)

First check

Determine if upgrade is required or optional

Test point: System prompt and message
Expected: Do you want to upgrade the system software? (optional)

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

Trackball intermittent operation

Trackball functions sporadically or loses control intermittently during operation

Ranked causes

1. Trackball contamination or partial blockage (common)
2. Control panel flex cable intermittent connection (occasional)

First check

Clean trackball

Test point: trackball assembly
Expected: intermittent operation ceases

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

Trackball movement is erratic

Trackball produces unpredictable or intermittent cursor movement

Ranked causes

1. Trackball contamination or wear (common)
2. Trackball failure (occasional)

First check

Clean trackball

Test point: trackball mechanism
Expected: Trackball movement becomes smooth and predictable

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

Video output not displayed on external monitor

External video monitor connected to video receptacle shows no display or video signal does not match internal display

Ranked causes

1. Faulty video cable or connector (common)
2. Video output circuit failure or incompatible external monitor (occasional)

First check

Verify video cable connection and integrity

Test point: Video connector/receptacle
Expected: Cable firmly seated with no bent or corroded pins; clear signal path

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

Control panel LED burned out

One or more LEDs on control panel are not illuminated

Ranked causes

1. LED failure on control panel (common)

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

Control panel LED is not illuminating

LED indicator on control panel is not lit or has burned out

Ranked causes

1. Control panel LED burned out (common)

First check

Visually inspect control panel LED

Test point: control panel LED
Expected: LED is illuminated

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

Erratic or inconsistent system behavior patient safety

System exhibits erratic or inconsistent behavior during operation, indicative of hardware failure

Ranked causes

1. Hardware failure (unknown)

First check

Observe for erratic or inconsistent behavior during operation

Test point: System operation and scanning sequence
Expected: Continuous, consistent scanning sequence without discontinuities

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

Image quality test needed after troubleshooting step patient safety

After replacing major components, system must undergo Image Quality Tests to verify diagnostic and repair success

Ranked causes

1. Component replacement requires post-service verification (unknown)

First check

After any major component replacement, perform Image Quality Tests

Test point: ultrasound image output
Expected: images meet quality standards per specifications

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

Incompatible transducer after upgrade rejection

System displays 'Incompatible transducer, upgrade the system software' message when required upgrade is rejected

Ranked causes

1. Required software upgrade rejected or cancelled (occasional)

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

Incompatible transducer message after upgrade cancel

System displays 'Incompatible transducer, upgrade the system software' when required upgrade is cancelled

Ranked causes

1. Required software upgrade rejected or cancelled (occasional)

First check

Determine if upgrade is required or optional

Test point: System prompt displayed at step 1
Expected: Message states 'required upgrade' or 'optional upgrade'

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

Main PCBA failure with assert code

System displays assert code with maintenance icon on screen, indicating main PCBA failure

Ranked causes

1. Main PCBA fault (unknown)

First check

Note assert code displayed on screen

Test point: system display
Expected: Assert code recorded

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

Main PCBA fault cleared after power cycle

Assert code or fault condition disappears after power down and restart

Ranked causes

1. Transient PCBA fault (occasional)

First check

Power down system

Test point: Power switch
Expected: System powers off completely after 5-10 seconds

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

No problem found but system may require AC power verification

System appears to work on battery but operator wants to confirm AC power capability is also functioning

Ranked causes

1. Preventive maintenance to verify dual-power capability (unknown)

First check

Confirm system operational on battery power

Test point: battery power
Expected: system powers on and audio/video displayed

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

No video on external monitor caution

External video monitor displays nothing or does not match system display when connected to video connector

Ranked causes

1. Video output malfunction or connection issue (unknown)

First check

Verify video on external monitor matches system display

Test point: video connector
Expected: video appears similar on external monitor and system display

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

Software upgrade erases stored images

System displays 'Do you want to upgrade the system software?' when new transducer connected; upgrade process will delete all images currently stored on system

Ranked causes

1. Software upgrade initiated (common)

First check

Verify any stored images are no longer needed

Test point: System display
Expected: Operator confirms images can be deleted or have been saved

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

Software upgrade in progress message displays

System shows 'Upgrade in progress (20 minutes total)' during software loading from transducer

Ranked causes

1. Required or optional software upgrade accepted (common)

First check

Monitor upgrade progress

Test point: System display
Expected: Progress message 'Upgrade in progress (20 minutes total)'

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

Software upgrade unsuccessful

System displays error code instead of 'Successful upgrade' message; upgrade did not complete properly

Ranked causes

1. Software upgrade process failed (rare)

First check

Verify successful upgrade completion message

Test point: System display after step 2
Expected: Message displays 'Successful upgrade'

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

Software upgrade unsuccessful

System displays error code after failed upgrade attempt; requires technical support contact

Ranked causes

1. Upgrade process failed (rare)

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

System display is blank

The system display shows no image or information

Ranked causes

1. System display failure (common)

First check

Attach external monitor to external video connector

Test point: external video connector
Expected: External monitor displays image correctly

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

System display is blank

Display shows no image or content while external monitor functions properly

Ranked causes

1. System display failure (common)

First check

Attach external monitor to external video connector

Test point: external video connector
Expected: external monitor displays image

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

System does not operate or battery does not hold charge

System does not power on or runs for less than expected duration on battery

Ranked causes

1. Battery depleted or defective (common)

First check

Verify battery is fully inserted

Test point: battery slot
Expected: Battery fully seated in slot

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

System restart after software upgrade

System displays progress indicator bars during restart; initial system screen shows bars while operating software is being replaced

Ranked causes

1. Software upgrade completed successfully (common)

First check

Monitor system restart progress

Test point: System display during reboot
Expected: Two progress indicator bars visible while operating software is replaced

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

System software upgrade in progress

System displays 'Upgrade in progress (20 minutes total)' message during transducer-initiated software upgrade

Ranked causes

1. Required or optional software upgrade from new transducer (common)

First check

Wait for upgrade completion or cancel

Test point: System display message
Expected: Upgrade in progress (20 minutes total) or Successful upgrade

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

System software upgrade required

Transducer with new software connected; system prompts to upgrade. Required upgrade blocks use of incompatible transducer.

Ranked causes

1. Transducer contains required software upgrade (common)

First check

Determine if upgrade is required or optional

Test point: System prompt message
Expected: Do you want to upgrade the system software?

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

System works on AC power but not on battery

System operates when connected to AC adapter but fails or does not power on when using battery

Ranked causes

1. Battery depleted or defective (common)

First check

Verify AC power is working

Test point: AC adapter and system
Expected: System operates on AC power

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

System works on battery but not on AC power

System operates correctly on battery but fails when AC adapter is connected

Ranked causes

1. AC adapter failure (common)

First check

Try system on AC power only (remove battery first)

Test point: AC power connector
Expected: System powers on and operates

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

Error codes

Code	Meaning	Trigger	Severity
`Incompatible transducer`	Transducer software is incompatible with current system software version	Required software upgrade rejected or cancelled	error
`Incompatible transducer, upgrade the system software`	Required software upgrade was rejected or not completed; transducer is incompatible with current system software version	Required software upgrade rejected by selecting no or cancelled during upgrade process	error
`Software upgrade unsuccessful`	System failed to complete software upgrade process	Error occurs during upgrade loading or installation	error
`Unsuccessful upgrade (various)`	Software upgrade did not complete successfully	Error code displayed instead of 'Successful upgrade' message during upgrade process	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.