I have tape lights that have worked perfectly for 6 years. They were wired into a switch and I have no idea if, or how a transformer was used. They are not on a dimmer. Even you you turn off the switch, the lights will continue to light/blink for a tiny bit.
Electrical – LED Tape Lights Strobing
electricalled
Related Solutions
If you actually have your fan connected to a light dimmer then you need to replace that with a fan speed controller. The motors of ceiling fans are not made to be run with a standard light dimmer.
The other thing is the windings of a motor are essentially a dead short when the power is first applied. Current spikes which creates a corresponding voltage drop on the line for a split second. As the electromagnetic field of the motor creates impedance the current falls to normal running current and the voltage drop disappears. Sensitive electrical equipment may be affected by these spikes.
That being said, a ceiling fan should not affect LED lighting in this way. The LEDs are not that sensitive and the motor is quite small. If this were normal millions of consumers would be complaining that their lights flicker when their ceiling fan is turned on.
So, again check to see if your fan is connected to a fan rated speed control not a standard light dimmer.
Maybe the connection to the switch is broken and it is returning to what it thinks is the previously set dimming level?
Or maybe the overheating or short-circuit protection in the LED-driver is activating and turning off the outputs.
The correct wiring is as shown below
Note that the "switch-dim" connection should be connected to a momentary pushbutton switch - not to an external dimmer and not to a normal two-position lightswitch.
Best Answer
Dead power supply
LEDs pretty much don't fail. Power supplies are the achilles' heel of LED lighting, and the primary reason why LEDs fail at all. (#2 being the lead-free [bad idea] solder crystallizing over some number of decades). Unfortunately people cannot resist making [read: buying] cheap power supplies.
You'll need to find this power supply unit, identify its voltage and current output, and get another one with SAME voltage and SAME OR GREATER current output.
If you want a hand with that, get a phone camera with a flash, and shoot a pic of the label on the thing. Then you can edit your question to add the photo.