3d printer bed not leveling

I don't know why, but the back right 3d printer bed leveling knob won't make the bed go up and down when I twist it. I tried taking the knob off and the screw won't do anything at all either. I know that this is probably just a simple piece of hardware that I need to tighten, but I don't want to make the issue worse or break something by just playing around with it.

ΠžΡ‚Π²Π΅Ρ‚ Π½Π° этот вопрос Π£ мСня Ρ‚Π° ΠΆΠ΅ ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΠ°

Π­Ρ‚ΠΎ Ρ…ΠΎΡ€ΠΎΡˆΠΈΠΉ вопрос?

Π‘Ρ‡Π΅Ρ‚ 0
Π”ΠΎΠ±Π°Π²ΠΈΡ‚ΡŒ ΠΊΠΎΠΌΠΌΠ΅Π½Ρ‚Π°Ρ€ΠΈΠΉ