ALL KEYS WORK ALL BUTTONS WORK AND KEYBOARD WORKS PERFECTLY.
I USED THIS VERY RARELY WHILE OWNING FOR ALMOST 10 YEARS. I MOVED A LOT WITH THIS AND IN THE PROCESS OF MOVING IT HIT SOME BUMP AND THE LEFT EDGE COVER/PLASTIC BROKE OFF AS CAN BE SEEN IN THE PICTURES. ALSO ON THE RIGHT SIDE EDGE IN THE CORNER A SMALL PIECE OF PLASTIC CAME OFF ALSO. BUT IT HAS A METAL FRAME SO THAT PLASTIC IS LIKE AN OUTER COVER/SHELL. THIS DOES NOT AFFECT THE FUNCTION OF THIS KEYBOARD. THE ENTIRE KEYBOARD WORKS PERFECTLY. ALSO ONE OF THE KNOBS IS MISSING AS CAN BE SEEN IN PICTURES.
I PAID $130 FOR A NEW POWER ADAPTER A FEW YEARS AGO. VERY RARE POWER ADAPTER EXPENSIVE TO REPLACE