Quantum singer 9910 just beeps when the foot pedal is pressed, will not sew.

SOURCE: Singer CE200 bobbin winder

I fixed it by going to the free web site. Thank you so much
Joe Varnum

SOURCE: Beeping Sewing Machine

Your problem is most certainly with the buttonhole switch. Firstly: Look if the buttonhole lever, left back of machine, is push up in position. The beeping sound is a warning message. Secondly Remove the light cover, left of the machine, loosen back screw and remove left hand screw completely. Check for a small black electric switch, follow the brown and green elecrtic wire, just back of the light. If you push the BH lever up and down the switch finger should also move up and down. If it stays down, the machine will not work and give a beeping sound. If the switch finger is stuck, push it up with the BH in top position. Hope this will help you

SOURCE: Singer 2638 - three "beeps" when the foot pedal is pressed

when I stiches any cloth the thread gets lose on backside of cloth or some times it breaks how to solve is problem I am not understanding please help me.

SOURCE: Bobbin problem with Singer Quantum 9910

Sounds like you need a new bobbin case

SOURCE: electronic sewing machine (singer 7442) will not sew buttonhole

Ensure that you have the buttonhole lever all the way down until it doesn't go down anymore. This might sound like a silly fix, but it's actually one of the most common mistakes made by people using this(and other automatic buttonholing) machine.