Solved Computer I built won’t turn on for first time, only displays yellow/orange light on Mobo when power switch on PSU flipped.

Recently finished my first PC build, and have got it all together and built. However the computer won’t turn on when the power button is pressed, no response at all from fans or anything. The only sign of life I get is a yellow/orange light around the gpu slots and lower left hand side of the motherboard when I turn the PSU switch on when it is connected to power. I have tried testing it with each different ram stick as well as with and without the gpu, each time no change, same response with the light and nothing else. I have checked all cables routing from PSU to various modules and from the case into the motherboard (usbs, power, reset etc) and all appears to be correctly connected. I have tested the PSU using a paper clip on the 24 pin cable and it works fine, and have tested it with the case’s fans and it works fine too, making the front and back fans on the case light up and run as well as making the cpu fan run, and when connected to the HDD using the paper clip test method the HDD can be heard running as well. Thoroughly stumped here, any help would be much appreciated - thanks in advance . My PC Parts are as follows:

Network Interface Card: GIGABYTE GC-WB1733D-I Wireless-AC PCI-E Network Interface Card
GPU: MSI NVIDIA GEFORCE GTX 1660 SUPER GAMING X Graphics Card 6 GB GDDR6, 1830 Hz, RGB Mystic Light, 3 x DisplayPort, HDMI, Dual Fan Cooling System MSI NVIDIA GEFORCE GTX 1660 SUPER GAMING X Graphics Card 6 GB GD...
RAM: Corsair CMK16GX4M2B3200C16 Vengeance LPX 16 GB (2 x 8 GB) DDR4 3200 MHz C16 XMP 2.0 High Performance Desktop Memory Kit, Black Corsair CMK16GX4M2B3200C16 Vengeance LPX 16 GB (2 x 8 GB) DDR4 3200Mhz
Monitor: AOC g2260Vwq6 21.5 AOC g2260Vwq6 21.5" Widescreen TN LED Black/Red Monitor (1920x1080)
Case: DeepCool TX Mid Tower TESSERACT SW DeepCool TX Mid Tower TESSERACT SW
SSD: Western Digital Green 240 GB Internal SSD M.2 SATA Western Digital Green 240 GB Internal SSD M.2 SATA
HDD: Seagate 1 TB BarraCuda 3.5 Inch Internal Hard Drive (7200 RPM, 64 MB Cache, SATA 6 Gb/s, Up to 210 MB/s, Model: ST1000DMZ10/DM010) Seagate 1 TB BarraCuda 3.5 Inch Internal Hard Drive (7200 RPM)
PSU: Corsair VS650 650 W Active PFC 80 PLUS Certified Power Supply Unit - Black Corsair VS650 650 W Active PFC 80 PLUS Certified Power Supply
Keyboard: Logitech G213 Prodigy Gaming Keyboard, RGB Backlit, Qwerty UK Layout, Black Logitech G213 Prodigy Gaming Keyboard, RGB Backlit, Qwerty UK Language
Motherboard: ASUS Prime B450-PLUS ATX Motherboard, AMD Socket AM4, Ryzen 3000 Ready, PCIe 3.0, M.2, DDR4, LAN, HDMI, DVI-D, USB 3.1, Aura Sync RGB Header ASUS Prime B450-PLUS ATX Motherboard, AMD Socket AM4, Ryzen 3000...
CPU: AMD Ryzen 5 2600 with Wraith Stealth Cooler YD2600BBAFBOX

gus said:

Pull everything out of the case and rebuild the PC on a non conductive surface, eg cardboard, and try that.

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Okay, cheers for your help, I will try that.

phillpower2 said:

WhipcatMetre

We are always happy to help when we can but we cannot safely do so if you are already receiving assistance on any other forum, doing so may lead to confusion as to whose and what guidance you are following which can be both dangerous and costly, decide on which forum you wish to continue and as a courtesy let the other/s know that assistance is no longer required.

Thank you for your understanding.

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Okay, don’t worry though, I have since fixed it. You can close the thread now