Each string has a control to change the color sequence which works normally.
Troubleshooting led christmas light strings.
Two terminal wires should be visible.
Led strings can fail when led leads corrode or wires break or fuses blow.
It can sometimes prove difficult to slide open the access door on a plug.
If the entire string is out start with a bulb at the end of the string.
Simply plug in the light strand and remove a bulb that s in or near the dark section.
I fixed mine by taking a copper wire about 1 5 cm 5 8 long and inserting it into the hole alongside the broken terminal wire.
I have a string of led christmas lights with a problem about 1 2 of the lights are on but very dim the other second half is on normal.
By removing from socket.
The next string which is plugged in after the problem string works normal.
Fixing any broken circuit involves locating the break then repairing it.
If half the string is out look for the dead bulb closet to the end.
Then a whole string or perhaps a half string circuit would go out.
These lights are key.
If not you may have found your culpret.
Look for the lights that have a splash of red on the bulb near the bottom.
Most brands of led christmas light incorporate a fuse in each strand.
Plug the string of christmas lights into the wall socket.