Owners of hp 4540s who have problems with the touchpad?

Question

Electronics

The touchpad does not work, I reinstall the drivers, the dispatcher and the synapsis program itself see the touchpad, the button on the touchpad, which at the top right does not light up, the touchpad simply does not work. I took it apart, and noticed that there was no cable from the touchpad to the motherboard, but the laptop did not understand, and the touchpad worked properly for some time, maybe it got me out?