Hi Scott
My HP Deskjet 690C went through this awkward phase a couple of months ago, showing the same symptoms as you describe. what was particularly annoying was the continuous printing of a couple of lines and then running the page through and printing more and more pages!!!
The answer was to re-install the printer.
It appears that sometomes the installation becomes corrupted and has to be trwated like a naughty boy.
Have you tried re-installing your printer?
#cheers
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Eddie from Rotherham
www.yamahakeyboards.info