Question about Singer Quantum 9940 Computerized Sewing Machine

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Electronic alert keeps coming on but the machine is running fine?

Hi, I'm having a problem with my singer 9940. The machine is running perfect except the electronic alert keeps popping up while I sew. It's the one that shows the presser foot then the bobbin. I have tried cleaning it, blowing it out with canned air. It is correctly threaded I don't know what else to do?

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Re: Electronic alert keeps coming on but the machine is...

Try replacing the needle. it may be just ever so slightly bent. You can not tell. causing more downforce on the machine.

Posted on Jan 07, 2007

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My quantum 9940 will not come on

It sounds like the main control circuit board (the brains) is defective/burned out

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How do I load bobbin

Go to and enter "9940." You can download the manual for free for the machine, which should tell you exactly how to load the bobbin.

It's a good idea to have the user's manual, anyways, and the downloaded one is more complete than the printed one of Singer's manuals in any case.

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How to use singer quantum 9940 ?

Go to and under customer support, see instruction manual, click that and put 9940 in the box. Now you can download a free copy of your manual. Save a copy to your computer and you can also enlarge diagrams for easy viewing.

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There may be something in the tensioners. Try to clean between the tension discs with a business card. Maybe this will help

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Electronic problems require professional to diagnose, sorry.

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I try to make a button hole with the 9940 Singer machine and I continue to come up with the machine doing nothing. I follow the directions in the manual, the presser foot I've changed to the correct one...

To the left of the foot there is a silver button hole lever pull this down fully.

Make a note in your handbook for next time as recently this happen to me and it took me hours to work it out.

Hope this is your answer.

Feb 24, 2009 | Singer Quantum 9940 Computerized Sewing...

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