HP 614c key pad not working

Bought HP 614c from total pda in Feb and key pad keeps stopping working

did a hard re-boot which seemed to solve the issue but cant remember how i did it and have lost instruction book
anyone any ideas before i send back to HP?

regards
Cossack

[Martin Laverty]

You can hard reset it from windows.

Instructions are here.
HP iPAQ 614 614c Hard reset - Soft reset -

Have you added any software to it that may be causing a conflict? You really shouldn't have had the same problem twice. I'd definitely get in touch with HP. 08708422339