Moliver

And another, the 8th LL120, started having issues with led's going out. This is getting ridiculous.

Fan/LED setup: Running (7) LL120's and (2) LL140's in an Obsidian 500d RGB case. H150i in front with (6) LL120's in push/pull, the other LL120 is in the back/top of the case for exhaust. Top of case has the (2) LL140's. The H150i is providing power to (3) LL120's in Push setup, the rest get power from Com Pro (custom fan curve for Pull fans). LED connections into (2) 6-port hubs, both connected to the Com Pro for lighting control. Also, fans are not on splitters for power or LED and I'm using iCue4 software with latest firmware. LED Issue: Fans and LED control work great (when all LED's are working), however I continue to have LED failures in the LL120 and LL140's. Since the LED's run in series, once a fan has a bad LED the rest of the fan can have issues along with fans downstream on the same hub. In January of this year I had (3) fans all have one or more LED's go out (1-LL120, 2-LL140's). They were past the 2-year warranty, therefore I purchased 3 new fans. Within the past week (4) additional LL120's have experience similar issues with LED failures. I've spent countless hours testing each fan using a dedicated hub and plugging into port 1, followed by running static Red, Green, and Blue profiles to troubleshoot. Sure enough, 4 separate LL fans have at least 1 LED out, some have several. These are NOT the new fans replaced earlier in the year, they are approximately 3.5 years old. Additional troubleshooting: I've been configuring different profiles and lighting layers in iCUE turning on/off certain LED's to possibly run the fans with fewer lights (trying to bypass the bad LED's). All the changes and custom configs didn't make a difference, the LED behavior and downstream impact remains. What's interesting, I created a custom "black" Scene on the Home tab using a static color profile of black (R0, G0, B0). The fans with LED issues either won't turn black, or the specific LED that's having issues changes to a random color. BTW, I've also swapped out Corsair's LED hubs (I have several after buying several 3-packs), the hubs haven't changed any behavior. And yes, when making physical connection changes I've powered down first, made connection changes, and powered on. Question: Is it normal to have frequent LED failures with the LL fans, especially after 3 - 3.5 years? After all the testing and verification of failures, I'm reluctant to purchase any more LL fan's. Any feedback on LED failure rates with the LL series fans would be great. For the price of the LL fans, buying 4 more to get the case looking as it way initially designed would be a gamble. Pics are of 3 different fans when testing. Thanks

I ran into this issue with the H150i AIO and an ASUS Crosshair VII motherboard during a new build last night. After reading several other threads, I noticed others are/were having the same issue. Decided to commend on this post as it's the most recent on my findings. Credit to DevBiker, he's done a great job making recommendations on this topic (and many others). To summarize his recommendations, make sure you're using the latest version of iCue software, bios is up-to-date, firmware updated, etc. He also suggested to test with another USB cable, plugging the micro USB into the pump head and the other into a standard USB port (on the front display or back - doesn't matter). After making sure the bios and all firmware was updated, I grabbed a micro USB and plugged directly into the pump head and then an available port on the back. Sure enough, iCue recognized the H150i pump and I could manage along with the Commander Pro. Device Manager also listed "Corsair USBXp Driver" now. Previously it wasn't displayed. I speculated bad cable, bad header on mobo, pump connection, etc. After ruling out the pump, I wanted to rule out the USB cable that came with the H150i. After unplugging the Commander Pro from the USB 2.0 header on the mobo, I connected the H150's USB to the same header. iCue recognize the pump, Corsair USBXp Driver listed in Device Manger and I was able to control/make changes. This ruled out the USB cable. I left the pumo's USB connected to the USB header on the mobo and connected the Commander Pro's USB into the other USB header (previously connected with H150i). Basically reversed what USB 2.0 header I was using (which initially corresponded to the manual). Now both the Commander Pro AND H150i are showing in iCue, I can manage both, and Corsair USBXp Driver is still listed in Device Manager. Not sure if this will help others. I love troubleshooting, stepping through physical and configurations until resolved. What I've learned, make one change at a time and test. If the issue continues, make another change, test. Rinse and repeat until physical connections and configurations are ruled out. Along the way hopefully the issue is resolved. Making too many changes at once will only cause confusion (and possibly not understanding what actually corrected the issue). OK, soapbox over. Thanks again to DevBiker and other contributors for their knowledge, experience, recommendations, etc.

First time post, long time reader :) Thanks for all your efforts to diagram different scenarios. My son (Freshman in high school) and I are building our first gaming PC. Case is the Corsair Obsidian Series 500D RGB SE along with the H150i Pro AOI cooler. Also purchased a 3 pack of LL120's to replace the fans on the H150i. We plan to run push-pull for the H150i, (2) LL140's at the top of the case, and (1) LL120 in the rear. The (3) fans that came with the H150i set to the side (not used, for now). We've been reading all the forums and documentation, the diagram in your first post is excellent. Question, looks like the fans on the radiator, going to be LL120's, connect to the H150i while the front case fans connect to the Commander Pro. If this is correct, would the CPU temp determine the fan speed for the LL120's on the radiator only? If so, the fans in front of the case are connected to the Commander Pro and wouldn't be on the same fan rpm speed, correct? Meaning, front fans spinning at different rpm than the fans on the radiator, even though they are sandwiching the radiator. Maybe I'm over thinking this, but wouldn't we want the front case fans and the radiator fans running at the same rpm when in push-pull? Thanks again, your diagrams have saved so much time.