The failure of the P1.25 display lamp beads to light up may be caused by a variety of reasons, including but not limited to:
Driver failure: The driver is a key component that controls the on and off of the LED lamp beads. If the driver is damaged or fails, the lamp beads will not light up.
Power supply problem: The power supply is not properly supplied or the power cord is connected incorrectly, which may also cause the lamp beads to not light up.
Lamp bead aging or damage: After long-term use, the LED lamp beads may age or damage, affecting their normal light emission.