Before you think the product is defective

You can mistake an error at the time of operating or installing a device as its defect.
If you think it is defective, check for defects in the below table.
If a problem continue to occur even after checking the below details, please call a designated agent and service centers.

Symptoms	Functions
There are small red dots, blue dots and green dots on the screen.	Since LCD is made with very high dot densities, under 0.01 percent of the total number of pixels, there may be lack of pixel or LED always lit.
No sound is heard and no image is shown.	Is a starter switch of a car on [ACC] or [ON]? Isn’t the system off?
The USB is not played.	When a USB memory is damaged, please use it after formatting with FAT 12/16/32.
Image is shown but sound is heard.	Is the volume control set at a low volume? Is it mute?
A sound is heard only in one speaker.	Dose the volume control of the front and rear and the right and left lean to one side?
It does not operate normally if an external device is connected.	Is the connection of an external device correctly made with a cable with warranty?
The last mode screen is not displayed when the power is OFF > ON.	The mode that plays by reading external source just as USB, iPod and Bluetooth audio mode may not be moved back to the mode shown last when the power is on according to the current condition If the previous mode is not in normal playback condition, it moves back to a previous mode.