Duplex Printing problem in HP 1320 printer

[Jacob_Collier]

I just acquired a used HP LaserJet 1320. The 1320 works flawlessly on my Windows 10 Professional 64-bit system, except for Two function for last four days, Duplex printing and indicator issue. I've looked here on the forum for a solution but can't find one that seems to apply specifically to my operating system.

     *1st issue -

I've logged into the Printer configuration utility for the printer to check the settings. The duplex printing is shown as enabled ("ON") in the Properties Paper Options. When I go to print a document and click on the "finishing" tab of document properties, I make sure to have "Print on both sides" enabled as well.

But whenever I put something to print on both sides, it is always printing the 2nd side or page only and the page is not even going inside for the printing of 1st page. instead of that an extra blank page is coming out. I have seen a lot of guide available online but nothing seems to help me.

     *2nd Issue - 

After printing 2 or 3 pages separately (as my duplex is not working, I need to print single side only) the Yellow light along with the Green light on the Green Button are flashing. I need to press the green button everytime to print a new page. I have no idea what is the problem going on.

[Valsimot]

What is your exact printer model the HP laserjet 1320 doesn't have an automatic duplex?

HP Laserjet 1320dn has auto duplex.

[Jacob_Collier]

Thank you for replying, it is Laserjet 1320 PCL 5.