Canon Imageclass MF6500 Series Copier with Blank Copies Prints Problem

I have a tip posted here on Fixya that addresses this very problem. Here is the content from that tip:
This tip works on all Canon Imageclass 6500 series machines including the MF6500 MF6530 MF6531 MF6540 MF6550 MF6560 MF6580 MF6590 and MF6595.
First of all if you are experiencing blank copies and or prints the best thing to do is try a different toner cartridge. In rare cases the black copies/prints CAN be caused by a defective cartridge. In MOST cases it is caused by a broken or detatched laser shutter lever or arm. When a toner cartridge is inserted and the door closed, a small plastic arm opens the laser shutter. If this arm is broken or has become disconnected then the shutter is not opened. This blocks the laser from writing the copy or print image onto the drum and this results in no print being applied to the paper. If the arm is broken you CAN open the laser shutter manually and block it open. What you need to do it open the cartridge access door, remove the cartridge and look for a 1/2 inch wide slot running from left to right in the metal frame that is in the back upper section where the cartridge goes. The plastic arm that operates the black plastic shutter is on the right side. If broken you can manually lift up the shutter and "block" it open using something like a folded up scrap of paper. I know it sounds strange but I have used this repair on several of my customers machines and they have all worked fine since. If you can not find or effect the repair yourself at least you will know where to point the service person when they come out to look at it.
Good Luck and Thank You for using Fixya.
WheatlandServices

Go to:

Canon MF6500 Series Support

If the Drivers & Downloads tab is not selected, click on it.

Although it shows a MF6550 at the top, the software and manuals are for the 6500 series of printers. There are guides for printing and scanning further down the list you can download too.

You do not say what operating system you have, but there are only drivers for Vista and Mac OS.

Thanks for using Fixya.

Cannon allways support there products i recommend going to there site and surfing the trouble shooting are from this link,
http://shop.usa.canon.com/webapp/wcs/stores/servlet/subCategory_10051_10051_-1_12054?utm_source=msn&utm_medium=cpc&utm_keyword=cannon+printers&utm_campaign=Canon+Printers+SendTec

This problem was solved by turning off the unit and unplugging the power overnight. The next morning it worked fine.

gracias