Repairing dimmer switch
Fuse is "fired" 
Uncover black jacket around "fuse" (first pic.) 
In my dimmer is fuse represented by resistor.
Resistor values are represented by color stripes

https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-resistor-color-code-4-band

https://learn.sparkfun.com/tutorials/resistors/decoding-resistor-markings

In my dimmer is 
0,29 Ohm +-5% tolerance -> stripes red, white, silver, gold
(or 29G Ohm - 29 000 000 000 Ohm +- 5% tolerance -> red, white, grey, gold - iam not shure in 3rd tripe, but i think that is imposible 29G Ohm in table light dimmer)