Played well last year but now when I insert a disc, it clicks a couple of times, indicates reading, then indicates no disc. I've tried a number of discs and this happens no matter how clean or new the disc is. I bought this at Sam's Club last year and of course never kept the receipt. I'd like to get my hands on a repair manual since I do not intend to pay more for repair than what I paid for the unit. Please advise.