OfficeJet all-in-one J6400 Not receiving incoming FAX

Question

Hello,
I have OfficeJet J6400 all in one in my office.   I'm not receiving faxes from anywhere-- companies, from my home.   Strangely, the only fax I receive is the Fax Test reply  from HP when I do the 877-HP-FAXME test.
I've tried the setup in all ways.... placing wires n all different places between printer and phone jack and DSL router.  I do NOT have Fax cable wire  connected between printer and laptop.  Just want to work with phone line jack and DSL.  However, the printer is able to print from laptop due to "wireless" connection.
I've also tried unplugging and replugging printer ast main electric plug to wall.  And have unplugged and replugged all connection wires between printer to wall jack and router(if any), in an effort to make sure all connections are firm.
By the way, this printer works great otherwise.
Anything else to try here?  Help.
THanks.

Answer 1

Hello and thank you for your kind reply.   That article is very good and comprehensive.  I recommend it to anyone with a problem with their printer.
I was going to post later, but mysteriously I fiddled around more with printer today.  And one strange thing I came upon was that in the "Devices and Printers" file,  the Officejet J6480 was  showing twice.   The first one was simply called "HP Officejet J6400 series".  And then  there was a second (installation?) icon called "HP Officejet J6400series (Copy 1)".  And of course, there were the icons for each for "fax".
So, I deleted the "(Copy 1)" icons only.
I should have done a fax test right then to know if that was the problem.
But I also tried once again to change attachment of the phone wire.  It has been between phone and wall jack. (and in a splitter plugged into a DSL filter!)    I changed it to plugging into Ext-2 line in Printer (and leaving other end in Phone).  And I left the wire that is attached to wall jack (just in DSL filter now) and printer "Line 1".
I did a HP faxme test and it worked.  And I called my phone to check if it answers to phone's internal answer machine, and it did.   This is new.  I have tried this arrangement before and these functions didn't work.  I do need to try a fax from another fax machine for the real test.  In past,  the HPTest would work but an external fax from a company or my home would not get through to this office fax/printer.  ??
If it all works, It is possible that removing the "Copy1" installation from Device page helped.
Who knows, but the phone and answer machine are working so far, which is an achievement.
I will report on a real Fax test done from elsewhere.
to follow.
Thank you again!