Keyboard problem

Hello,



I was having trouble with my keyboard typing wrong letters so I got a wireless keyboard which worked great until recently. Then it wouldn't type certain letters. Incredibly I fixed the problem with the laptop keyboard with the solution related to numlk and scrlk keys-thank you, thank you!. However, my wireless keyboard won't respond to the same solution and still won't type certain letters. Nothing spilled on it. Any ideas? Thank you