How do if fix a radio that comes on but no sound in a 2008 KIA Amanti
Infinity stereo system

For 2008, Kia updates its Amanti midsize sedan both inside and out. The Amanti's spacious and comfortable interior has a more luxurious feel, thanks to such features as a leather-covered armrest, wood trim, new interior door handles, and an updated dashboard. Standard convenience and comfort features abound as well and include dual-zone automatic temperature control and one-touch automatic power windows, while heated leather seats and a premium Infinity audio system are among the Amanti's many options.
Exterior updates include a reshaped hood and trunk lid, and new headlights and taillights, though some drivers and reviewers feel the Amanti still has a rather utilitarian and even a stodgy look. That image might change when you step on the gas pedal, though, thanks to the 264-horsepower, 3.8-liter V6 engine under the Amanti's hood. Kia notes that the engine not only delivers plenty of power, but is fuel-efficient as well.
The Amanti has excelled in recent safety tests and has been awarded the highest rating in side-impact crash tests from the International Institute for Highway Safety. And attesting to the Amanti's build quality is a 10-year/100,000-mile warranty offered by Kia.
The Amanti rides on an independent suspension that has been improved for better handling. Antilock brakes are standard, although traction control, stability control, and brake assist are available only as options. A Leather Package and Premium Package, which includes black interior trim and chrome-finish 17-inch wheels, are available as well.
Infinity stereo system
I replaced both bulbs and one does not light up. I switched the bulbs and still the one side does not light up. Could this be a fuse or could it be the wiring?
I'm really trying to take off the Dash cover skin of dashboard to redo a poster dashboard interior needs recovered how do you get dead skin off dashboard
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: element · Single disc in-Dash CD · Premium Brand: Infinity · AM/FM radio · 1 subwoofer · Total Number of Speakers: 8
Brakes
ABS: 4-wheel · Front brake diameter: 11.9 · Front brakes: ventilated disc · Rear brake diameter: 11.2 · Rear brakes: disc
Comfort Features
Armrests: rear center folding with storage and pass-thru · Center console trim: wood · Dash trim: wood · Door trim: leatherette · Floor Mat Material: carpet · Floor Mats: front · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Adjustable pedals: power · Center console: front console with storage · Cupholders: front · Dimming rearview mirror: auto-dimming · Memorized settings: side mirrors · Multi-function remote: trunk release · One-touch windows: 4 · Power outlet(s): 12V front · Reading lights: front · Rear power outlet: 12V · Steering wheel: tilt-adjustable · Steering wheel mounted controls: cruise controls · Storage: door pockets · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 8
Drivetrain
Axle ratio: 3.33
Exterior Features
Grille color: chrome · Paint: pearl
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 2
Instrumentation
Warnings and reminders: low fuel level
Lights
Headlights: Auto on
Mirrors
Exterior mirrors: power
Passenger Seat
Power adjustments: 4
Rear Seats
Type: bench
Roof
Sunroof: power glass
Safety
Active head restraints: driver · Child seat anchors: LATCH system · Crumple zones: rear
Seatbelts
Rear center seatbelt: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front
Seats
Driver seat power adjustments: height · Front seat type: bucket · Heated: front seats · Rear headrests: adjustable · Rear seat folding: flat · Upholstery: premium cloth
Spare Tire
Mount Location: inside · Size: temporary
Spare Wheel
Rim Type: steel
Stability and Traction
Stability control: electronic
Suspension
Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: double wishbones · Rear Shock Type: coil over shock · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): rear
Tires
Type: all season
Tires and Rims
Wheels: painted aluminum
Windows
Front wipers: variable intermittent