Frequently, there are customers and friends who report that after the newly-buyed advertisement car has gone home, there are several screens or the whole screen is not bright. Many friends will worry about this time, is not our LED display problems, even more worried about the quality of the car. Below, advertising vehicle manufacturers explain in detail the reasons for these phenomena. In general, these problems do not mean that the display screen of the advertising vehicle is broken, nor is it that the quality of the vehicle is not good. The reasons for these phenomena are mainly due to the fact that some customers are far away from our factories and travel long distances. In particular, some customers do not take the national highway in order to save money, and take provincial roads, bumpy roads, causing the rear of our display screen cable or power supply If the interface is loose, several screens will not be lit or the whole screen will not be lit. Because if the LED display malfunctions or burns out, it will not light up several screens at once. Therefore, if the purchase of advertising vehicles, especially newly purchased, appears these situations, we must first check the back of the screen to the corresponding power box and cable to see if there is a loose phenomenon, and carefully check the power connector inside, re-inserted If you operate like this, this phenomenon usually disappears. If, as I said, all of them are not good after inspection, you can contact our company's after-sales staff. We have professional after-sales service personnel to serve you. If there is damage to the corresponding parts of the advertising vehicle, you only need to send the damaged parts back to our company. We will send out the new accessories and teach you how to use them until your problem is solved. The car resumes use. Article Source: http:// Sales Hotline: 0722-7028566 Contact: Manager Wu Contact Tel: 18871139605 Led Flashlights,Light Flashlight,Strong Led Flashlight,Aluminum Alloy Led Flashlights NINGBO KLEANSOURCE ELECTRONIC TECHNOLOGY CO., LTD , https://www.ksledlight.com