Singer Quantum XL1 jammed I went to do a stitch pattern, and the needle broke (it isn't in the bobbin case...was all intact and I removed and replaced it), turned it off for 20 mins (system is supposed to reset itself) and also tried turning it off and unplugging, etc. It starts to move and then does a little moan/grind and freezes. Is there some way I can unjam it, as I don't want the "$100 just to show up" fee, if it is something easy that I can do myself. It sews like a dream and I keep it really clean, so don't want an service. Thanks!

The Singer Quantum XL1 has a needle bar positioning spring. It's actually a J shaped bar with a rubber stopper at one end and a hole for the 1 screw on the other end.
When it breaks the rubber partly off or falls off completely the machine shows signs.
The thread can jam or,
The needle bar extends too far left or right.
Also your needle may stop going up and down. It works for regular stitches if you pull the needle bar back down with your hand. For a while anyway.
Sometimes regular stitches work. But you can't sew the large designs like bear, bunny, lamb, duck. Until you replace it.
There is only 1 screw, needle bar tops at the rubber stopper of the J. Or the metal J shape end looks like a c if rubber is missing. So the rubber slips on
See image.
I've only found the entire needle bar positioning spring. It's like I said is not a spring at all it's a metal piece with a rubber gasket on one end
Good luck

Also you may need to use a light stableizer. If the material has gotten jammed before. look at your needle plate where the needle goes in. Has it been damaged? is there a gap, hole, slice, small piece missing? Where needle tinged the plate?
A dent or cut that makes it wider? You'll keep getting "caught"
Try Use stabilizer or get new needle plate.
The good news it's about $10 for the needle bar stabilizing spring.



https://www.sewingpartsonline.com > ...Needle Bar Position Spring, Singer #283091