Printer not printing all pages

[dosstech]

My hp 2800 is printing blank pages, for example it prints page 1 then page 2 is blank, page 3,4,5 prints the correct information but page 6 and 7 are blank

 

[Tradesman1]

Sounds like it may be on it's last legs, the 2800 is what 8-10 years old?