The on/off button is flashing. It will not print and flashes up that there is a paper jam, but there is no paper jam

This error means jammed paper or a foreign object is blocking print head movement. Turn off the printer, press the adjust lever down to the lowest position, and pull out the jammed paper. Open the cover and remove any jammed or torn paper, or foreign objects. Then do one of the following:

Sheet Feeder: Return the adjust lever to the position. Turn on the printer, reload paper, and press the paper button.

Manual Feed Slot: See page 15 of your manual for loading instructions.

Roll Paper: Cut off the printed portion with scissors, then remove and reload the roll paper

The error code 50 indicates a paper jam condition. Whether there's actually still paper jammed or not, it's sensors are still indicating a jam. Check again for a bit of paper, or there may be a faulty sensor.
Check out this link: Brother for further information.

I hope this will help you :)
* Green Power light flashes- The printer is receiving a print job, replacing an ink cartridge, charging ink, or cleaning the print head.
* RED paper light is On- If the CD/DVD try guide is open, close the CD/DVD tray guide, load paper, then press the paper button. Your paper ran out or multiple sheets loaded at the same time . Load paper and press the paper butoon to resume printing.
* RED paper light flashes- Paper is jammed in the printer. Press the paper button to eject the jammed paper. If the light is still flashing , open the cover and remove all paper, including any jammed or torn pieces. Then reload paper and press the paper button to continue printing.
* RED Ink Light Flashes - One or more cartridges are low on ink. Check the message that appears on your screen to determine which cartridge is low, or follow the instructions in " Checking the Ink Supply". Make sure you have a replacement cartridge.
* RED Ink Light is ON- One or more cartridges are out of ink or not installed. If you have just installed a new cartridge, it may be incomaptible with the printer or incorrectly installed. Reinstall it or replace it with the correct cartridge
* RED Ink and RED paper lights flash alternately- The CD/DVD tray guide was left open when you turned on the printer or when printing on paper. Just simply close it/
* Green Power Light is Off; RED paperand RED Ink Lights flashing- Paper may be blocking movement of the print head. Turn off the printer, then open the cover and remove any jammed paper or other foreign objects. Turn the printer back on again. Or it may have an internal error. Turn off the printer, wait a few seconds, then turn it on again.

Canon Bubble Jet orange light flashes

review this to determine your problem.. If all else fails simply unplug your printer wait a minute and plug back in.

Handling Error Messages

When a printer error occurs, the POWER/ERROR lamp flashes.
The number of flashes indicates the type of error that has occurred.

Count the flashes and take the appropriate
action to correct the error.
Number of Flashes
Possible Cause
Try This
Two flashes Printer is out of
paper/Paper does
not feed
Reload paper in the Sheet Feeder or Cassette and press the RESUME/CANCEL
button.
Three flashes Paper jam/Paper
Output Tray is
closed
Clear the jammed paper, reload paper in the printer, then press the RESUME/
CANCEL button. If the Paper Output Tray is closed, open it.
See “Paper Jams” on page 72.
Four flashes Empty ink tank Press the RESUME/CANCEL button to resume printing with an empty ink tank.
Replace it with a new ink tank immediately after the printing. It may damage the
printer if you continue printing with an empty ink tank.
See “Replacing an Ink Tank” on page 42.
Five flashes Print Head not
installed/Print
Head not installed
correctly/Defective
Print Head
Install the Print Head. If the Print Head is already installed, remove the Print Head
and check the electrical contacts for foreign matter, then reinstall.
After reinstalling the Print Head, you may need to realign it.
If this error still remains, the Print Head may be damaged. Contact the Customer
Care Center.
Six flashes Inner Cover is open Close the Inner Cover and press the RESUME/CANCEL button.
Eight flashes Waste ink absorber
almost full
The printer has a built-in waste ink absorber for the ink used during Print Head
Cleaning.
Eight flashes indicates that the waste ink absorber is nearly full.
Press the RESUME/CANCEL button to cancel the error so you can continue printing.
Before the waste ink absorber becomes completely full, contact the Customer Care
Center.
Nine flashes A specified period
of time has elapsed
without receiving a
response from the
digital camera/The
digital camera or
digital video
camcorder
connected is not
compatible with
this printer

Disconnect the camera cable, press the RESUME/CANCEL button and reconnect
the cable.

If the error is still unresolved, there is a possibility that you are using a digital
camera or digital video camcorder that is not supported by this printer. Use a
digital cameras or digital video camcorder compatible with this printer

Answer Part 1 of 2

An error has occurred in the printer. The number of flashes indicates the type of error, as outlined below. Check the cause and take appropriate action.
Two flashes: Out of paper or paper feed error
Reload the paper correctly and press the RESUME/CANCEL button.
Three flashes: Paper jam
If paper has jammed in the printer, clear the jam, reload the paper in the printer correctly and press the RESUME/CANCEL button.
See Paper Jams
Four flashes: Ink tank is not installed properly
Open the Print Head Cover and check whether an ink tank is installed. If an ink tank is installed, push the button of the ink tank, and reinstall the ink tank properly.
Five flashes: No Print Head installed, or Print Head failure
Install a Print Head.
When the error continues, contact a Canon service representative.
Eight flashes: Waste ink absorber almost full
Ink used for cleaning is absorbed in a waste ink absorber placed in the printer. Eight flashes indicate that the waste ink absorber is nearly full. Press the RESUME/CANCEL button to cancel the error so that you can continue printing.
Important
If this error occurs, replacement of the waste ink absorber and maintenance of the printer are required. Canon recommends to contact a Canon service representative as soon as possible. Once the waste ink absorber becomes completely full, it cannot be printed until the Waste ink tank is exchanged.

Nine flashes: A specified period of time has lapsed without receiving a response from a digital camera or digital video camcorder / The digital camera or digital video camcorder connected is not compatible with this printer

Here are all the flashing explanations:

Two flashes: Out of paper or paper feed error

Reload the paper correctly and press the RESUME/CANCEL button.

Three flashes: Paper jam

If paper has jammed in the printer, clear the jam, reload the paper in the printer correctly and press the RESUME/CANCEL button.

See Paper Jams

Four flashes: Empty ink tank

If you press the RESUME/CANCEL button, it will continue printing with an empty ink tank. After printing is finished, replace the ink tank immediately. If you continue printing with an empty ink tank, it may cause damage to your printer.

Refer to your Quick Start Guide for instructions on how to replace an ink tank.

Five flashes: No print head installed/Defective print head

Install the print head. Also, ensure that the protective tape has been removed.

If reinstalling the print head does not solve the problem, replace it with a new one. Contact the Customer Care Center.

Eight flashes: Waste ink tank almost full

The printer has a built-in waste ink tank for the ink used during print head cleaning. Eight flashes indicates that the waste ink tank is nearly full. Press the RESUME/CANCEL button to cancel the error so you can continue printing. Before the waste ink tank becomes completely full, contact the Customer Care Center.

The Power Light Flashes Orange - Error Codes When an error occurs, the power light flashes orange. The number of orange flashes followed by a long green flash indicates the cause of the problem.
Two orange flashes: Out of paper, paper jam, or paper feed error
If no paper is loaded in the auto sheet feeder, or if the paper is not loaded correctly, set the paper correctly and press the Resume button on the printer to continue printing.
Three orange flashes: Paper jam
If paper has jammed in the printer, carefully remove the jam and press the Resume button to continue printing.
Four orange flashes: A tank inside the BJ cartridge (print head) is out of ink
Replace the empty BJ tank and press the Resume button to continue printing.
Five orange flashes: BJ cartridge is not installed properly
Remove and reseat the cartridge correctly. Make sure the orange protective cap and tape have been removed. Make sure the blue locking lever is locked down securely.
Six orange flashes: BJ cartridge (printhead) is not installed
Remove and reseat the cartridge correctly. Make sure the orange protective cap and tape have been removed. Make sure the blue locking lever is locked down securely.
Seven orange flashes: BJ cartridge (printhead) is defective
Remove the BJ cartridge and check that the contacts on the cartridge and cartridge holder are clean. Make sure the orange protective cap and tape have been removed and reinstall the cartridge. If the error occurs again after you resume operation, you may need to replace the BJ cartridge.
Eight orange flashes: Waste ink absorber almost full
The printer has a built-in waste ink absorber to hold the ink that is consumed during print head cleaning. This error indicates that the waste ink absorber is nearly full. Press the Resume button to skip the error so you can continue printing.
The POWER light flashes orange and green alternately: Service error
A service error means the printer requires the attention of a qualified technician. Count the number of flashes. (You may be asked this information.)

Well... here it is :

The POWER Lamp Flashes Orange An error has occurred in the printer. The number of flashes indicates the type of error, as outlined below. Check the cause and take the appropriate action.
When a printer error occurs, the POWER lamp flashes. The number of flashes indicates the type of error that has occurred. Count the flashes and take the appropriate action to correct the error.
Two flashes: Printer is out of paper /Paper does not feed
Reload paper to the sheet feeder or cassette and press the RESUME button.
Three flashes: Paper jam/Paper output tray is closed
If paper is jammed, remove the jammed paper, reload paper in the printer, and then press the RESUME button. If the paper output tray is closed, open it.
See Paper Jams
Four flashes: Empty ink tank
Press the RESUME button to resume printing with an empty ink tank. Replace it with a new ink tank immediately after the printing. It may damage the printer if you continue printing with an empty ink tank.
Five flashes: Print head not installed/Print head not installed correctly/Print head is defective
Install the Print Head. If the Print Head is already installed, remove the Print Head and check the electrical contacts for foreign matter, then reinstall.
After reinstalling the Print Head, you may need to realign it.
If this error still remains, the Print Head may be damaged. Contact a Canon service representative.
Six flashes: Inner cover error
To print on paper:
Close the inner cover. Then press the RESUME button to start printing.
Do not move or close the inner cover during printing. It may damage the printer.
Seven flashes: The CD-R or DVD-R is not set on the CD-R tray
Reset the CD-R tray feeder with a CD-R tray containing a CD-R or DVD-R, and then press the RESUME button. Printing will resume.
This function only works with models that support CD-R printing.
Eight flashes: Waste ink absorber almost full
The printer has a built-in waste ink absorber for the ink used during print head cleaning. Eight flashes indicates that the waste ink absorber is nearly full. Press the RESUME button to cancel the error so you can continue printing. Before the waste ink absorber becomes completely full, contact a Canon service representative.
Important
Canon recommends that you call for service as soon as this error occurs. Once the waste ink absorber becomes completely full, printing will no longer be possible.
Nine flashes: A specified period of time has lapsed without receiving no response from the digital camera / The digital camera or digital video camcorder connected is not compatible with this printer
Disconnect the camera cable, press the printer's RESUME button and reconnect the cable.
If the error is still not solved, there is a possibility that you are using a digital camera or digital video camcorder that is not supported by this printer. Use a digital camera or digital video camcorder compatible with this printer.
Ten Flashes: Cannot print on both sides of the page
The size of paper may not be compatible with automatic duplex printing. For information on the size of paper compatible with auto duplex printing, see "Automatically Printing on Both Sides of the Page." Pressing the RESUME button will discharge the paper, and restart printing from the front side of the next paper. The reverse side will not be printed when an error occurs.
Eleven flashes: Cannot perform automatic print head alignment correctly
Possible causes are as follows:
A4 or Letter-sized paper is not loaded on the sheet feeder.
Ink has run out or ink tanks are not installed correctly.
See Ensure that the ink tank is installed properly.
Ink level is low.
Print Head nozzles are clogged.
Press the RESUME button.
For information on how to print a nozzle check pattern, see "Printing the Nozzle Check Pattern."
The paper output slot has been exposed to a strong light source preventing correct print head alignment.
Press the RESUME button to resolve the error. Align the printer so the paper output slot will not be exposed directly to a strong light source.
After carrying out the above measures, if the problem continues after aligning the print head again, press the RESUME button to resolve the error, and then perform manual print head alignment. For details on manual print head alignment, see "Aligning the Print Head."
POWER lamp flashes alternate green and orange:
An error that requires contacting a Canon service representative may have occurred.
Disconnect the printer cable from the printer, and then turn the printer off and unplug the printer from the power supply. Plug the printer back in and turn the printer back on after leaving it for a while.
If the problem remains, contact a Canon service representative.

The BJC 3000 will flash two different colored lights in a pattern to signal several different errors. From the documentation I have the two colors are orange and green, could those be the colors you see? At any rate here is the code: Two orange flashes: Out of paper, paper jam, or paper feed error. If no paper is loaded in the auto sheet feeder, or if the paper is not loaded correctly, set the paper correctly and press the Resume button on the printer to continue printing. Three orange flashes: Paper jam. If paper has jammed in the printer, carefully remove the jam and press the Resume button to continue printing. Four orange flashes: A tank inside the BJ cartridge (print head) is out of ink. Replace the empty BJ tank and press the Resume button to continue printing. Five orange flashes: BJ cartridge is not installed properly. Remove and reseat the cartridge correctly. Make sure the orange protective cap and tape have been removed. Make sure the blue locking lever is locked down securely. Six orange flashes: BJ cartridge (printhead) is not installed. Remove and reseat the cartridge correctly. Make sure the orange protective cap and tape have been removed. Make sure the blue locking lever is locked down securely. Seven orange flashes: BJ cartridge (printhead) is defective. Remove the BJ cartridge and check that the contacts on the cartridge and cartridge holder are clean. Make sure the orange protective cap and tape have been removed and reinstall the cartridge. If the error occurs again after you resume operation, you may need to replace the BJ cartridge. Eight orange flashes: Waste ink absorber almost full. The printer has a built-in waste ink absorber to hold the ink that is consumed during print head cleaning. This error indicates that the waste ink absorber is nearly full. Press the Resume button to skip the error so you can continue printing. The POWER light flashes orange and green alternately: Service error. A service error means the printer requires the attention of a qualified technician. If you have any more questions let us know otherwise please don't forget to rate this post.