Help with a dead PC please.

Hi folks,

Last night my PC died, I was gaming and it went to a blank screen. All the fans and lights on the GPU and CPU died as well as the rear fan on the case. The red CPU light on the motherboard came on. The machine was still running though. There was still a white light on the GPU. The temp inside the case was quite high but I'm not sure how normal that is. There's no signs of damage on any visible components.

This morning I took the cooler off the CPU to give it a thorough clean, I also removed the CPU to check for any damage. Nothing obvious. Replaced both components carefully and reconnected everything. Now there is no power and it won't even start let alone boot. Help please.

CPU: AMD Ryzen 5

GPU: Asus AMD RX 580

Power: Corsair TX650

Mobo: MortarMax MSI B450M