New desktop Pc dead after 8 days

[Maclaverty]

So I have just RMA'd my computer back to PC specialist today after only 8 days due to it not powering up. When you click power all the PSU did was click once. I stripped the MB down to just the MB and CPU and even powered it up from the motherboard to no avail. How can it go from working perfectly one day to not even powering up the next. I suspect faulty PSU or MB but intrigued to hear people's thoughts?

Case	CORSAIR 275R AIRFLOW TEMPERED GLASS GAMING CASE
Processor (CPU)	Intel® Core™ i7 Eight Core Processor i7-10700K (3.8GHz) 16MB Cache
Motherboard	ASUS® TUF Z490-PLUS GAMING (LGA1200, USB 3.2, CrossFireX) - ARGB Ready
Memory (RAM)	16GB Corsair VENGEANCE DDR4 3000MHz (2 x 8GB)
Graphics Card	8GB NVIDIA GEFORCE RTX 2080 SUPER - HDMI, 3x DP GeForce - RTX VR Ready!
1st Storage Drive	2TB SEAGATE BARRACUDA SATA-III 3.5" HDD, 6GB/s, 7200RPM, 256MB CACHE
1st M.2 SSD Drive	512GB PCS PCIe M.2 SSD (2000 MB/R, 1100 MB/W)
Power Supply	CORSAIR 650W TXm SERIES™ SEMI-MODULAR 80 PLUS® GOLD, ULTRA QUIET
Power Cable	1 x 1 Metre UK Power Cable (Kettle Lead)
Processor Cooling	PCS FrostFlow 120 Series RGB High Performance Liquid Cooler
Thermal Paste	STANDARD THERMAL PASTE FOR SUFFICIENT COOLING
LED Lighting	50cm RGB LED Strip
Sound Card	ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)
Wireless/Wired Networking	WIRELESS INTEL® Wi-Fi 6 AX200 2,400Mbps/5GHz, 300Mbps/2.4GHz PCI-E CARD + BT 5.0
USB/Thunderbolt Options	MIN. 2 x USB 3.0 & 2 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS
Operating System	Windows 10 Home 64 Bit - inc. Single Licence [KUK-00001]
Operating System Language	United Kingdom - English Language
Windows Recovery Media	Windows 10 Multi-Language Recovery Image - Unlimited Downloads from Online Account
Office Software	FREE 30 Day Trial of Microsoft 365® (Operating System Required)
Anti-Virus	BullGuard™ Internet Security - Free 90 Day License inc. Gamer Mode
Browser	Microsoft® Edge (Windows 10 Only)
Warranty	3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour)

 

[SpyderTracks]

Usually if the motherboard lights were on but it wouldn’t boot that would suggest the CPU wasn’t getting power, could have been a loose cpu cable on the motherboard or failed PSU.

 

[Maclaverty]

So I turned off all RGB lights early on but couldn't see any MB specific lights when turned on so either TUF MB doesn't have a power light or the PSU is dead. I did try seating all cables again but no luck.