Question about HP LaserJet 3330MFP All-In-One Printer

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HP LaserJet 3330MFP quit recieving & sending faxes

The fax machine has worked well, until a couple days ago. When a call is coming in, it show incoming call, then shows no fax received. When trying to send a fax, it shows no fax sent. I hear no dial tone, and see no error messages. Tried T.30 Protocol Trace which shows0.00 OFFHOOK, 6.49 CNG and 10.00 ONHOOK. No other information. A new fax machine works well on the dedicated line, so I believe the problem is in the fax machine. Any suggestions?

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  • RGCraig Feb 27, 2008

    I had figured out that may be the problem, but not sure enough to order the part. I've even had it out. I just ordered it. I will let you know if that works.


  • RGCraig Mar 05, 2008

    Thanks for suggesting the source for the L.I.U.; it was much cheaper than HP. I received it today, and replaced the old one. Still, it does not work.

    If I watch the screen when it is receiving a fax, it first shows "Incoming Call", then says "No Fax Detected." I printed a Fax Activity Log, and it shows that each received call shows "No Fax Detected."

    At this point, the only thing I can figure is that either I have the ribbon connector in wrong, or it is bad.

    Any help would be appreciated.


    It worked fine

  • danielle217 Jan 08, 2009

    Suddenly the bulb takes forever to warm up and I also have a message "no fax detected"?


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Your Line Interface Unit (L.I.U.) is bad. The part # is C9138-60001. Google for part availability.
1 Open or remove the left side door.
2 Remove one screw at the left of the formatter board.
3 Disconnect the flat flexible cable from the connector.
4 Rotate the LIU around the hooks to remove.

It's about a 5 min job. Good Luck.

Posted on Feb 27, 2008

  • Brad Clapp Mar 05, 2008

    Are you running your phone line through a surge protector and is the line working? Check the cable, make sure the ribbon cable is installed correctly and completely. Was the part you bought new or was it a "pull"? There really isn't anything else it can be unless the replacement part is bad.


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