Touchpad stopped working dell inspirion 15 3521

Hello,

I have dell inspirion 15, 3521.

I am using win 10 64bit.

After some time on the laptop my touchpad is stopping working, cursor not moving. I already tried everything updating to the latest driver 19.0.9.4 Snaptics, installing reinstallign i have the same issue.

Sometimes on start up mouse touchpad is not working and need to plug in external mouse.

Sometimes also when my touchpad stops working also my keyboard stops working, sometimes when i power the lap top and on the start up when i need to enter my pass for win account keyboard and touch pad are not responsive and the Capslock light is on and when i try tipping any key everything is non responsive tried every driver i format the win and still with same problem.

I think that maybe my palmrest is bad and I need to chance whole palmrest as i see on the internet there is a part palmrest to be changed. Before i buy it i want to hear your opinion it is not expensive something like 30$ .

Looking forward to hear form you.