There is a vertical line indicating that the screen is broken, it is recommended to replace it with a new screen, if it is not replaced for a long time, it will slowly grow to a certain point that the entire screen can not be seen, if it is within the warranty period, it is recommended to take Huawei authorized after-sales engineers to help you detect whether it is a quality problem. If it is a quality problem, Huawei after-sales service will help you replace an original screen for free
Most of the screen is broken, irreparable, only to change the screen. There is also a problem if the data foot of the screen is welded, or the cable buckle is loose. Check it out at the phone repair place