Question RGB Light Strip Destruction

[srtudas]

So my friend bought a Kingwin RGB light strip and plugged it into his motherboard RGB header, he has an Asus Z390 Prime motherboard and he plugged it in with everything off and unplugged. When he turned on the computer he said the light strip worked for about 10 seconds then shut off and then the entire computer shut off. After unplugging the light strip and waiting 10-15 minutes the motherboard RGB lights that are on even when the computer is off came back on but the computer won’t turn on at all. I already told him to try a different outlet, check his I/O plugs but neither worked. He dissassembled the computer and has the motherboard at a repair shop where they are investigating the issue. What do you think may have happened? The guy at the repair shop thinks maybe PSU which is a Corsair CX750M or capacitors on motherboard are fried. He double checked that he plugged it into the correct header, could the strip have just been faulty? He bought the strip from Microcenter so it wasn’t from a shady tech store. We’re just hoping if it fried anything it fried the PSU or motherboard at the worst.

His Specs:
CPU: Intel Core i7-9700k
MB: Asus Z390 Prime
Ram: 16GB (2 x 8) Corsair Vengeance Pro RGB DDR4-3200
PSU: Corsair CX750M

 

[cin19]

a Kingwin RGB light strip

The MB RGB header can support up to maxi. 3Amp the light strip.
So it depends on how long and how much power the strip will draw the power. And How did you friend connect the strip into the MB? I guess the RGB header may have problem, that was caused by the strip.

The PSU should have no problem to power the strip + the PC, but you did not list he had the GPU or not. Also if the PSU is the old model, I mean it is the white/green color one, and he had a powerful GPU, the PSU may have problem to power the GPU.

 

[srtudas]

Interesting. He has a Gigabyte GTX 1080Ti. You may be right, that GPU probably sucks a lot of power. Since we’re on the topic, I have a CS850M and I am running 2 x 1070s, do I need to upgrade? I haven’t had any issues in 2+ years but if you think his 750M might have struggled then I might be in a similar situation soon. Sorry off topic, I will link the strip that he bought. I believe he just plugged in the 4 pin plug to the 4 pin RGB header on the motherboard. On the box it even advertises as being “Aura Sync Compatible” which probably doesn’t mean much. Unfortunately he is in college in a different state from me so swapping power supplies isn’t practical. Anyway, thank you for you help, I will steer him towards a stronger PSU.

https://www.microcenter.com/product/502972/rgb-magnetic-led-flexible-strip-w--adhesive-option

 

[cin19]

If he used only one, and the PSU is the old model, and I think the PSU may have problem. Like the other guy said the capacitors on the PSU.

Your PSU is much better than the old model CX750M, you are fine.

 

[srtudas]

Thank you for the help. That’s also good to know that I don’t need to upgrade. I will pass on the message.