If your Canon printer displays Canon Support Code 6900, it usually indicates an internal printer error that prevents normal operation. In most Canon PIXMA, MAXIFY, imageCLASS, and MegaTank printers, this error appears when the printer detects a hardware or system fault during startup. Canon recommends powering the printer off, unplugging it for a short period, and restarting it. If the error persists, the printer may require professional service.

Fortunately, not every 6900 error means your printer is permanently damaged. In many cases, a simple reset or basic troubleshooting can restore normal operation.

What You’ll Learn

• What Canon Support Code 6900 means
• Common causes of the error
• Step-by-step troubleshooting
• How to reset your Canon printer
• When the error requires repair
• Tips to prevent future printer errors
• Frequently asked questions

What Does Canon Support Code 6900 Mean?

Canon Support Code 6900 is a general printer error generated when the printer detects an internal problem during initialization. Unlike paper jam or ink errors, Support Code 6900 doesn’t point to one specific component. Instead, it signals that the printer cannot complete its startup process because of a hardware or firmware issue. Canon’s official guidance for many PIXMA and MegaTank models is to power off the printer, unplug it, wait briefly, and restart it. If the error remains, service is typically required.

Common printer families that may display this error include:

• Canon PIXMA series
• Canon MegaTank (G Series)
• Canon MAXIFY printers
• Canon imagePROGRAF models

Common Causes of Canon Support Code 6900

Several issues can trigger this error.

Internal Hardware Failure

A failure involving the printer’s logic board, sensors, or internal electronics may stop the printer during startup.

Interrupted Startup Process

Power interruptions while the printer is booting may leave the device unable to initialize properly.

Firmware Problems

A failed or interrupted firmware update can cause startup errors.

Power Supply Issues

Faulty power outlets, damaged power cords, or unstable voltage can prevent the printer from operating correctly.

Internal Communication Failure

The printer’s internal components must communicate during startup. If one module fails to respond, Support Code 6900 may appear.

Symptoms of Canon Support Code 6900

Besides the error message, you may notice:

• Printer won’t start
• LCD displays Support Code 6900
• Orange warning light blinking
• Printer freezes during startup
• Scanner functions unavailable
• Printing completely disabled

How to Fix Canon Support Code 6900

Follow these troubleshooting steps in order.

Restart the printer.

1. Turn off the printer.
2. Disconnect the power cord.
3. Wait for at least 60 seconds.
4. Plug the printer back in.
5. Turn it on again.

Canon recommends this as the first troubleshooting step for Support Code 6900.

Check the power source.

Verify that:

• The outlet is working.
• The power cable is firmly connected.
• No extension cord is causing voltage issues.

If possible, plug the printer directly into a wall outlet.

Disconnect External Devices

Remove:

• USB cable
• Ethernet cable
• USB flash drives

Restart the printer with only the power cable connected.

Inspect the Printer

Open the printer carefully and check for:

• Stuck paper
• Foreign objects
• Loose ink cartridges
• Obstructions in the carriage path

Never force any moving parts.

Allow the Printer to Complete Initialization

Sometimes the printer needs several minutes to complete startup after reconnecting power.

Avoid pressing multiple buttons during startup.

Update Firmware (If Accessible)

If the printer starts normally after restarting:

• Check for firmware updates.
• Install only official Canon firmware.
• Do not interrupt the update process.

Firmware improvements often resolve software-related stability issues.

How to Reset a Canon Printer Showing Support Code 6900

A basic power reset may clear temporary faults.

Soft Reset

1. Turn off the printer.
2. Unplug the power cable.
3. Wait one minute.
4. Hold the Power button for 10 seconds while unplugged.
5. Reconnect the power cable.
6. Turn the printer back on.

If the printer boots normally, the error was likely temporary.

When Canon Support Code 6900 Requires Professional Repair

If the error continues after basic troubleshooting, the printer may have an internal hardware fault. Canon advises recording any additional detailed error information (such as EC codes, where available) and contacting an authorized service center.

Professional repair may be needed for:

• Main logic board failure
• Sensor malfunction
• Internal power supply damage
• Hardware communication failure
• Severe firmware corruption

Tips to Prevent Canon Support Code 6900

Follow these best practices:

• Always shut down the printer properly.
• Keep firmware up to date.
• Use a surge protector.
• Avoid unplugging the printer during operation.
• Remove paper jams carefully.
• Keep the printer clean.
• Use genuine Canon ink cartridges when possible.

Routine maintenance can reduce the risk of startup and hardware-related errors.

Quick Answer

What is Canon Support Code 6900?

Canon Support Code 6900 indicates that the printer has detected an internal error during startup. Start by turning the printer off, unplugging it for one minute, and powering it back on. If the error persists after restarting, Canon recommends contacting an authorized service center because the issue may involve internal hardware.

Frequently Asked Questions

Is Canon Support Code 6900 a hardware error?

Yes. In most Canon printer models, Support Code 6900 indicates an internal printer error that may involve hardware or system initialization.

Can I fix Canon Support Code 6900 myself?

You can often resolve temporary faults by power cycling the printer, checking for obstructions, and verifying the power source. Persistent errors generally require professional service.

Does resetting the printer erase my settings?

A basic power reset does not erase printer settings. Factory resets, where available, may remove network and custom configuration settings.

Can a firmware update fix Support Code 6900?

If the printer starts successfully, installing the latest firmware may improve stability and resolve software-related issues.

Should I continue using the printer if the error disappears?

Yes. If the error clears after restarting and the printer functions normally, continue using it while monitoring for recurring issues.

Conclusion

Canon Support Code 6900 is a general internal printer error that usually occurs during startup. In many cases, the problem can be resolved by restarting the printer, checking the power connection, removing any obstructions, and ensuring the firmware is up to date. However, if the error persists after these troubleshooting steps, it likely indicates an internal hardware problem that requires assistance from an authorized Canon service center. Following regular maintenance practices can help reduce the likelihood of encountering Canon Support Code 6900 in the future.