Question PC not getting past post after installing a new liquid cooler

Jan 9, 2020
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I just built my PC, I started it and it all worked fine played games on it and it ran well, I decided to get a liquid cooler, and also got a 8 slot 4 pin splitter so I could have 3 corsair rgb fans going. After installing these 2 things I started the pc for the first time and smoke starting coming out of one of the fans, the rgb wire had completely melted. I removed the fan and the splitter. Turned it on again and now have red debug light on mobo, its the cpu one that's on. I have no signal going to monitor, mouse or keyboard.
The cpu fan is definitely plugged in.

I have tried almost everything I have read online about this issue.
  • take ram sticks out put them in different slots
  • unplug psu hold power button for 30 seconds
  • take cmos out
  • tried a different psu
I am about to buy a new CPU and if that doesn't work, a new MOBO. I can't work out what's wrong with it and it's driving me mad

Parts
  • Cooler Master MWE Gold Fully Modular 550W Power Supply
  • Intel Core i5 9400F Processor
  • Gigabyte Z390-UD Motherboard
  • ASUS GeForce GTX 1660 TUF Gaming X3 OC 6GB
  • Corsair Hydro H115i RGB Platinum 280mm AIO Liquid CPU Cooler
 
Jan 9, 2020
4
0
10
0
Forgot to mention that the pc starts up everything is working but fans on GPU and running at full speed. I have also tried turning on without the GPU but same black screen on monitor.
 

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