On track 1, played on my late-80's Denon DCD-1700, the CD skips at exactly 18 seconds (regardless of the CD), and skips to about the 1 minute mark, and continues playing. Track 2 also skips, but later tracks do not. What is the best way to troubleshoot this? Clean the lens? Does the lens need realignment? Is the laser failing? Pardon my dummy questions here. I looked in the forum but didn't find an answer to my dilemma. If anyone has advice or can point me to an existing thread, thanks in advance!