fan lights flash

[mtw5875]

fan lights turn on upon boot then turn off. fan spins fine

 

[Lutfij]

List system specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

What is the make and model of your chassis(and/or CPU cooling?) fans? How have you connected the fans in your system?