Why am I getting blank pages in between the normal printed pages

SOURCE: Normal print results in a blank page

If you try and print a test page form the printer it will be light also. If this is the case you have a cloged cartridge. You can try to clean the cartridge, or replace it.

SOURCE: prints extra blank page for every one page of printed material BEWARE SPAM NUMBER 1-800-532-4187

Ok, I too have HP Photosmart 7280 and it was spit'g out a blank page after each print page.
I went into the Control Panel/Printers - Right click on the HP Photosmart 7200 series icon and choose delete. Don't worry...just delete it.
Right above (Vista) click on Add a Printer - it's going to ask you if you want to add a local printer which is connected via USB connection or if you are set up wireless then choose Network
It will find your printer click on the printer hit next - then this is the most important step
It will ask you to find the manufacturer it shows Hewlett-Packard and underneath it shows HP - Do not click on HP - you'll have the same problem with that driver - choose Hewlett-Packard and find this driver HP Photosmart C7200 series Version 61.71.244.0 [3/23/07]
Hopefully they are all digitally signed with this information.
Click on that driver and click next - then click on replace the current driver and click next.
Print a test page and problem should be solved. Hope it helped!

SOURCE: I get blank pages when printing. Sometimes all pages are blank, sometimes first and last page print, with blank middle pages.

1. Try cleaning or replacing your laser scanner mirrors.
2. Make sure that your transfer roller is seated properly.
3.Update your printer driver.
4.You might have failing power supply, make sure that the drum ground spring is connected to the engine controller board properly. You can also replace your high voltage power supply.

Hope this helps.