Harman Kardon HD 990 Owners Manual - Page 13

HD 990 Troubleshooting Troubleshooting Symptom No lights on front panel Remote does not appear to operate Front panel lights, but CD does not play Play indicator lights, but no sound is heard Sound skips or stutters during play Sound is continually distorted "Error" lights up continuously in the display Cause • No AC Power • Power switch turned off • Weak batteries • Blocked sensor • Disc is upside down • Poor connections • Wrong source connections • Disc may be damaged • Surface vibrations • Incorrect input • Various Solution • Make certain that AC power cord is plugged into a live outlet. • Turn on Power switch. • Install fresh batteries, observing polarity indications. • Remove obstructions from the front panel sensor or connect a remote sensor to the Remote In jack on the rear panel. • Reload disc with label side facing up. • Make certain that connections are secure and made to the correct (e.g., CD) input. • Select CD source on receiver or preamp. • Try another disc. • Isolate the unit from vibration by placing it on a firm surface or move it further away from the speakers. • Make certain that the analog Audio Outputs  of the CD player are connected to a line-level audio input, NOT to a digital audio or phono input. • Turn the unit off and on again. If the problem persists, turn the AC power to the CD player off and on. 13