aser scanner unit error.Turn off the printer, and then turn it on again. If the same error occurs, turn off the printer, then contact the store you purchased the printer, or a service representative. When contacting the service representative, inform them of the error code displayed and symptoms.Error Code: E100 0000
Problem
You are unable to print and receive the message Error 5100 on the computer or printer display screen.
Cause
Error 5100 is a carriage error that can usually be fixed by using service mode and flushing the printer heads when it has a blockage.
Solution
Try the following:
You can follow the following steps to take a test page from LBP2900.
1) Goto --> Start --> Control Panel-->Printers and Faxes.
2) You can see that Printer name inside the above folder. Right Click on the same and click on Properties. Now you will be in General Tab.
3) You can see the "Print Test Page" Button on the same. Click on that you will get the test page.
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The Canon LASER SHOT LBP-2900 only has a usb port to my knowledge. If it is saying incorrect port you can try to right click on the printer, click on printer properties, click on ports and then select USB001 virtual port. Good luck.
The problem is with the printer head which is normal in Laser Printers. Try cleaning the printer head with a cotton cloth and it'll resolve the problem a very large extent.
Had the same problem. This is what worked for me:
Switch off the printer, remove the power cable, remove the usb cable, wait for 10-15 seconds. Re-insert the cables, switch on the printer. Mine worked after that.