hello,
I recently got a very nice AT case with a 2 digit LED display. The small PCB gets three inputs : +5V (and ground), the turbo light, and a single wire for the turbo light status (that plugs to the mainboard). It worked for a while, but after I tried to change the setting, it stopped working : the LEDs stay unlit, and the turbo light status is not updated with the mainboard information anymore 😵
I made sure that the +5V is well on the wires, and I also checked the display segments with a multimeter (I made the segments lit very lightly by pluggin the anode and the catode with a multimeter), just to make sure that it worked.

But now I'm dry, and I don't know what else I could check to figure out what is wrong 😢

Any suggestion would be very welcome. Thanks in advance !