My friend decided he wanted to jump on stand on top of my amp and when he was trying to stand up he stepped on the input cord and bent it, along loosening a connection with some kind of connector on the inside. No other damage was done to it and we got all the little pieces from the cord out of the input hole. But the hole points downwards now and when I plug my guitar in it makes a high pitched squeal so i think that if i replaced the connector that sends the electrical signal to the rest of the amp, then it would work. I do not know where to buy the part or how to fix it. I would be very grateful if some one could show me how.