Keyboard problem I have a 720 that does something very strange. The 2 W S X keys suddenly decided to stop functioning. If you look on the keyboard this is sort of a line of keys. I replaced the backup battery and they started to work again for a few hours then went off again. I have done the full reset i.e. removing backup battery and main battery, for 5 mins but the keys will not work at all now.

pls remove the key board ribbon cable and re seat again

The laptop keyboard will need to be replaced, go to www.ebay.com type make and model of laptop, refine search to keyboard.

Could be key switch failure, even though the keyboard is new.

The function key could be damaged or stuck down. If not, try going to Device Manager. Right click on the Keyboard and choose Properties. Click on Update Driver as it might find something. Reboot the computer. If that doesn't work, go to Device Manager, right click on the keyboard, choose Uninstall, and reboot the computer. When it starts up and sees the keyboard and loads a driver(s) for it, it might fix it. Good luck.

In laptops with a small screen (14,15" ) the keyboard is accordingly smaller than for desktops, and there is no numeric keypads, or arrow pad. So the keys 7,8,9 0, U,I,O,P,J,K,L ,comma, dot, / have a triple function: the primary function, the shifted function, and a third accessed by an FN-Fx key combination. The actual key combination may depend on manufacturer. If that key combination has been activated, the foregoing keys perfom the third function they were designed for..
Read your laptop manual to find out how the Fn- function key works and deactivate the Fn-Fx combination responsible for your keyboard behavior..(this article was posted by k24674)..

or else u r keyboard is likely to b defective or ur ram or the system board..
lightly strike/tap the keypad using ur hand..
if u r a professional, open the keyboard..deep clean all the carbon contacts beneath the keys using Iso-Propyl alcohol..put/stick 'Carbon-Dots' (available in cheap level spare market) as n where necessary..

hope it'll work..
always better to seek professional supervision esp of ur system admin/vendor....

Hold down the "Fn" key and the Press the F11 key or the corresponding F Key that says NumLk on it. The light should go off and all should be back to normal.

This is a warranty cloaim and is not unknown for TomTom GPS. You might want to consider changing it for a more reliable brand

Try This

Maybe you accidentally activated the F-Lock.

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bin it

You have a numeric keypad built into the keyboard, press the function button (FN) followed by the number lock button (num lock). Hope this helps.