Dell N7010 keys not working

I have an Inspiron N7010. The g,h,', 1.0 & escape keys no longer work.

I plugged in a external keyboard and it works.
I have tried removing the battery and holding the power button for a few seconds.
I tried cleaning and resetting the ribbon cable.
I tried cleaning the keyboard with air.
I tried uninstalling the keyboard from the device manager.
I tried disabling the Bluetooth.
Nothing has worked so far. Any suggestions? Should I order a new keyboard?