Hi all, I've got a K800 keyboard and just recently several keys have stopped working. the keys in question aren't in a group but sort of dotted around. The ones i've found so far are the 7 and 9 on the keypad the insert and the right hand square bracket key. I've stripped the keyboard down but i can't see how the keyboard actually makes a connection to register the keystroke. any ideas on a fix or what else i could look at?