Instruct: Classify Amazon reviews into positive or negative sentiment
Query: RECEIVER STOPPED WORKING

I used the keyboard and mouse for a few weeks with no problems then they suddenly stopped working. After trobleshooting for hours I finally was able to decide that the problem was not with the mouse or keyboard but with the receiver, the little USB thingy that allows the keyboard and mouse to be wireless. As it turned out my boyfriend's brother has a different model of the logitech wireless keyboard and mouse duo and when I plugged his receiver into my computer my keyboard and mouse began to work again. I wrote to logitech asking if I could buy a replacement receiver but have had no reply. I just wanted to warn everyone of the perils of wireless hardware. I don't expect to hear from logitech and if I did I suspect they would tell me they don't have separate USB receivers to buy.