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VQT4K90
11
Troubleshooting guide
■ Common problems
No sound.
Turn the volume up.(
x
x P 7)
A “humming” sound can be heard during
play.
An AC mains lead or fl uorescent 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 non-standard.
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 fi le size or high memory USB fl ash
drive takes longer time to read.
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.