Troubleshooting guide
Before requesting service, make the following checks. If you are in doubt about some of the check points, or if the solutions indicated in the chart do not solve the problem, consult your dealer for instructions.
■Common problems
No sound.
Turn the volume up.(x P.7)
A “humming” sound can be heard during play.
An AC mains lead or fluorescent light is near the unit. Keep other appliances and cords away from the unit.
■Discs
Display “no” or play will no start.
You have not inserted the disc correctly, insert it correctly.
Disc may be dirty. Wipe it clean.
Replace the disc if it is scratched, warped, or
Condensation has formed: Wait 1 to 2 hours for it to evaporate.
■Radio
A beat sound is heard.
Turn the television off or move it away from the unit.
A low hum is heard during AM broadcast.
Separate the antenna from other cables and cords.
■USB
The USB drive or its contents cannot be read.
The USB drive format or its contents is/are not compatible with the system, “no” is displayed. Unplug the USB device and insert it again. The USB host function of this product may not work with some USB devices.
USB devices with storage capacity of more than 8 gigabytes may not work in some instances.
Slow operation of the USB device.
Large file size or high memory USB flash drive takes longer time to read.
VQT4K90
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