https://www.youtube.com/shorts/22PEZTiQTRQ

How to solve the LED display has a bright line
A bright line remains on the LED display
There are generally two reasons for this to happen:
First：There is a problem with the controlled IC, find this IC and replace it
Sencond：One of these lamp beads is broken, use a heat gun to heat these lamp beads，
Suddenly heated to a certain LED lamp bead, the whole LED display will be fine,So we found this LED lamp bead,Re-solder the lamp pin of this lamp bead or replace it with a new lamp bead