Any suggestions on what to try to fix my notebook keyboard?

Last week, my HP notebook's integrated keyboard abruptly quit working. I have Norton 360 and it didn't show a virus issue. I tried system restore to an older date an that was of no help. I ran the diagnostics offered with Norton and it said that I had no keyboard attached. I ran the only diagnostic steps offered on the HP website and that stated that I should have a new integrated keyboard installed or get a separate usb keyboard. I ordered a keyboard. But, it is not working either. (Yes, I did restart the computer.)

Any suggestions on what I can try to make either keyboard work? I certainly hope there may be something that I can do at home without having to take the computer to a repair shop.

Thanks.