Question LED fan lights turn on for a split second while booting then turns off.

[Weabman]

I recently bought a new CPU Case and LED Fans, they are separate brands. from the reviews (of the LED Fan) i kept seeing even lower specs than mine have all 6 or 8 LED fans lighting up normally, mine lights up for a second when booting then turns off after but the fans itself seem to run normally, just without lights and the PC runs normally.

My Specs:
Intel i5 4460
Gigabyte Z97mx Gaming 5 Motherboard
Gigabyte RX570 4gb DDR5
8 gb Corsair Valueselect RAM 1333mhz
2x 120gb M4 SSD's
Cougar SL 600 PSU

My CPU Case is a Philiipine Made Case named Rakk Kisig (doesn't even have a manual to it)
I have all my fans connected to the PSU (molex connector)
my LED Fans was just a random chinese brand called YGT (since most branded products on my country are too expensive than the prices of western countries with the same brand)

Edit: i've uploaded a video of it
https://imgur.com/a/X4aKj5Kfbclid=IwAR1CCPuLyF59GWIBV5XCrb2_IRaJMFWC9vgPBnOftWeu2AQUSiuE6BA4YnM

 

[Mtop]

Weabman,
We will need a better descriptions:
How many plugs/connectors, and how many wires per connector (any labels/tags)
on fan?
LEDs can be turned on with power on, some case fans have a two wire switch, newer rgb fans use a controller w/usb or motherboard connections.
How are your lights controlled? Software, hardware, or always on?

 

[Karadjgne]

Not sure why you have case fans hooked up to molex instead of directly to the motherboard, but that's not the issue. Those YGT fans are not led, they are ARGB as far as I can tell, which means they must be powered through some sort of control box, since your motherboard does not have ARGB capability. That's the lighting, not the fans, those are totally seperate things.

So where is the lighting connector hooked upto?

 

[Weabman]

They're just a standard type of fans with molex connectors connected to the PSU, no controls etc. Anyway this happened a while ago while taking a video of the fan, it lights up whenever i insert the psu molex connector halfway

https://imgur.com/a/lIAkeGA

View: http://imgur.com/a/lIAkeGA

 

[Karadjgne]

What's that other wire coming from the fan? Understand, it's very rare that argb/rgb fans are molex powered. If I had to guess, I'd say that isn't a molex power plug, but the rgb plug you stuffed the molex into and the other wire is the 3/4pin fan header.

The reason nothing turns on is because it's not connected properly. The argb/rgb plug needs to be connected to an argb/rgb splitter to the motherboard or some sort of control box. Not to a molex power plug.

 

[Weabman]

Sorry for the late reply, school is starting and I've been quite busy. So yeah. The fan only has one wire which is the 3/4 pin and it fits with the molex connector. So I'll probably buy a splitter to test it out on the motherboard, also. Whenever i fully plug the fans to the molex connector, it also affects the gpu as it sometimes blink a white LED light. That means abnormal power supply? (i think?) but after doing the thing on the video where i stuffed the psu molex connector halfway, it now works fine. Is it the PSU I'm having problems at?

 

[Bazookatron263]

Sorry for the late reply, school is starting and I've been quite busy. So yeah. The fan only has one wire which is the 3/4 pin and it fits with the molex connector. So I'll probably buy a splitter to test it out on the motherboard, also. Whenever i fully plug the fans to the molex connector, it also affects the gpu as it sometimes blink a white LED light. That means abnormal power supply? (i think?) but after doing the thing on the video where i stuffed the psu molex connector halfway, it now works fine. Is it the PSU I'm having problems at?

Hey,
I have the same issue and it was again a chinese brand. Did you find a fix for it yet?

 

[Wafrik88]

Same problem i got a case i bought it on my friend it works with him but mine wont its only connected to the psu

My specs
A320km prime
R5 2600
660GTX
8gb RAM

 

[Bazookatron263]

Same problem i got a case i bought it on my friend it works with him but mine wont its only connected to the psu

My specs
A320km prime
R5 2600
660GTX
8gb RAM

This happened to me either because the molex cable either wasn't plugged in properly or not enough power since I chained the moelx cables ( fans were spinning but no LED). Fixed it by plugging each fan to a separate molex cable from the power supply. You should try just plug one fan and see if the lights work, then try the others.

 

[Stewbacca]

I had the same issue. I found that the lights would work when the molex was only half plugged in. I checked it with my multimeter and found it was only pulling 7v instead of 12v from one of the pins when it was half plugged in. Because the fan only used 3 wires on the molex plug (power for fan, power for light, ground) I checked the fourth pin from the PSU and found it only supplied 7v. So I pulled the molex coming from the fan apart and redid it so that the led wire was plugged into the 7v pin (end pin), fan into one of the 12v pins (either of the 2 centre pins) and the ground stayed in the same spot (other edge pin). Bit hard to explain but hopes this helps.

 

[Karadjgne]

Should not be plugged into molex at all. A molex plug has 12v, ground, 5v pins. When the 12v and 5v power is combined, you get 7v outputs.