SONY CDP-CX55 50 + 1 CD Changer Tested & Does not read disk

50+1-Disc Compact Disc Carousel Changer CDP-CX55 Made in China 1997 Specifications Disc format: CD (51 disc multi play) CD Mechanism: KSS-213B/S-N Frequency response: 2Hz to 20kHz Dynamic range: 88dB Signal to Noise Ratio: 107dB Channel separation: 100dB Total harmonic distortion: 0.013% Line output: 2V Digital connections: optical Dimensions: 430 x 182.5 x 295mm Weight: 5.3kg Year: 1997 Original, no repairs or modifications, cleaned and tested to be in excellent working order. Reads quickly. Rotates to disc but doesn't read disk Front panel controls all tested and work, display screen is bright and visible. Doesn't read disk