Unable to Print 2-Sided on L7780...

Question

Hello...I have a L7780 that has worked fine for approximately a little over one year.  I was printing from Tray #2 (legal-sized paper) the other day & suddenly experienced numerous paper jams.  Multiple times, I had to remove the duplexer, as well as open the print-carriage access door to clear the jams.  Eventually, I was able to resolve the issue & printing resumed in a normal fashion.
Today...I wanted to print a PDF document & found that it was only printing one side of each page; however, 2 sides would successfully print intermittently.  I checked all of my settings & tried again, to no avail.  I thought that perhaps it was the document.  I tried another PDF document & then a Word document...same results.
I aligned & cleaned the printheads, as well as ensured that the printheads were in correctly.  I also calibrated the linefeed.  I checked to make certain that the duplexer was inserted correctly ~ I removed it & reinserted it.  The printer will feed the paper back through, as it always has...it simply will not print on both sides of the paper consistently, as it is supposed to.
I am unable to print a 'Self-Diagnostic' page ~ only a very tiny strip of the heading of this document will print. 
I also went into the printer properties to make sure that my accessories were installed...I uninstalled & re-installed them.  I have unplugged & plugged the printer back in the socket.
There are no alerts that come up after the printer boots up & runs through its self-diagnostics.
I have also tried to print from both trays.
Additionally, I installed the S/W listed below...
HP Officejet Pro Full Feature Software And Driver
I am very concerned, as this is a replacement for another printer (different model) & the duplexer was the problem w/the previous printer.  I appreciate any suggestions or input that anyone might have.
I use this printer wirelessly & my OS is Vista Ultimate 64-bit.
Thank you!
Dana.
Message Edited by Dangerous_D on 01-09-2009 11:37 PM

Answer 1

Apparently, I have similar problem as yours. My L7780 wireless all-in-one printer worked perfectly fine for a bit more than a year but now the printer kept on popping an error message that says out of paper, load paper when printing two-sided documents. At first, it prints 2-sided erratically and then deteriorates with that error message popping up after every 2-sided printing attempt.  I have tried every possible solution (e.g. using different tray, fan the paper stack and re-insert, re-startting both printer and computer, and so forth) but none was successful. I paid $500 for this unit with no third party warranty coverage. Sigh...
Dangerous_D wrote:
Hello...I have a L7780 that has worked fine for approximately a little over one year.  I was printing from Tray #2 (legal-sized paper) the other day & suddenly experienced numerous paper jams.  Multiple times, I had to remove the duplexer, as well as open the print-carriage access door to clear the jams.  Eventually, I was able to resolve the issue & printing resumed in a normal fashion.
Today...I wanted to print a PDF document & found that it was only printing one side of each page; however, 2 sides would successfully print intermittently.  I checked all of my settings & tried again, to no avail.  I thought that perhaps it was the document.  I tried another PDF document & then a Word document...same results.
I aligned & cleaned the printheads, as well as ensured that the printheads were in correctly.  I also calibrated the linefeed.  I checked to make certain that the duplexer was inserted correctly ~ I removed it & reinserted it.  The printer will feed the paper back through, as it always has...it simply will not print on both sides of the paper consistently, as it is supposed to.
I am unable to print a 'Self-Diagnostic' page ~ only a very tiny strip of the heading of this document will print. 
I also went into the printer properties to make sure that my accessories were installed...I uninstalled & re-installed them.  I have unplugged & plugged the printer back in the socket.
There are no alerts that come up after the printer boots up & runs through its self-diagnostics.
I have also tried to print from both trays.
Additionally, I installed the S/W listed below...
HP Officejet Pro Full Feature Software And Driver
I am very concerned, as this is a replacement for another printer (different model) & the duplexer was the problem w/the previous printer.  I appreciate any suggestions or input that anyone might have.
I use this printer wirelessly & my OS is Vista Ultimate 64-bit.
Thank you!
Dana.
Message Edited by Dangerous_D on 01-09-2009 11:37 PM