I _ave 2 letter keys and t_e backspace key doesnt

The keys on nearly all keyboards are "matrixed" together so that when a group fails at the same time their part of the wiring has a problem. It might be in a chip and therefore not really repairable, but if you think something might have been spilled into the keyboard, it could cause a problem like this. In that case, power down the keyboard, open it and look for stains or moisture. Moisture can be removed with a towel or leaving it under a warm lamp for a few hours. Stains can be removed with a Q-tip dipped in isopropyl alcohol (available at drugstores). If the stains are under a chip, you could try getting the alcohol under it anyhow and hope that it dissolved the stain, but it may also not be able to be repaired.

With the low pricing on wireless keyboards and mice nowadays, especially Black Friday sales, you'd be better off buying a better keyboard and mouse for a good deal. Usually when a few keys begin to give you problems it is the sign of the beginning of the end.

Sirwriter