Toshiba laptop Keyboard not working

Toshiba Tecra A10 Win XP. My second laptop problem of the day ! Child spilt Orange juice over Toshiba Tecra Keyboard of wife's laptop. Mopped up quickly but now no keys work at all. Laptop also continually beeps when turned on. All seems to work using a USB keyboard. Have removed laptop keyboard but can find no obvious area of damage/ liquid ingress. Wondered if one key was stuck through the spillage and tried to tap all of them multiple times...very occasionally could get a number to appear in notepad totally unrelated to the key pressed but normally zero response. Happy to try and fit a new keyboard (if available) but just wondered if I might be missing something. Thanks.