Both Ctrl keys are not working on my laptop

I have a Lenovo ideapad 700 and both of my Ctrl keys are not working. Up to this point, I have tried for possible solutions. It can not be that both of my Ctrl keys are broken.

I have checked updating, uninstalling the keyboard drivers, checking going on safe mode and seeing if it works there, without any success. Checked the following link HERE, or here, here

I have checked also similar questions here, without any success.

This fact that my Ctrl A,C,V are not working, it is making my workflow very difficult.

I had the same problem on Lenovo ideapad 700 15isk both Ctrl keys not working. It is no BIOS or software problem, it's hardware. I fixed mine by opening the lid, tacking off the battery, disconnecting the keyboard, and putting a piece of paper 1 mm tick on the keyboard cable to keep pressure. It worked, if it doesn't work try trimming half a mm 1/2 mm from the keyboard cable. That works as well....