Unlike my last laptop, this keyboard never had liquid spilled on it.

Regularly, backspace, backslash and enter keys fail to work. I tried deleting the driver, blowing out keys but the following symptoms keep occurring.

• backspace, backslash and enter keys fail to work
• I press all three for about two seconds
• they work for a while (sometimes only once)
• they fail again (back to the first dot point)

I'm guessing a new keyboard is required to correct a circuit fault, but am asking if someone else has experience and can suggest an alternative?

PART 2:  If keyboard replacement is necessary, a hand tremor puts the intricate work beyond my capacity. How much should I expect to pay?

EDIT: Dell Inspiron 16 7630 2-in-1