So a while ago I my computer, under load, would crash, fans full blast, then go into a boot loop. This has been happening for a while. But a week or so ago, the computer failed to turn on at all. Usually when power gets connected it flashes a white light, and when you press on button, fans light up. This time, nothing happens but a specific light, lights up a different colour each time. I figured PSU was buggered since the computer never overheated, as I always checked the temperature of the components. So I bought a new PSU, some cables were to short (main and CPU connectors) so I bought extensions. This new PSU has no I/O switch, despite it being mentioned in manual, and when I plug no, no lights (Not even the one when it stopped working all together) no fans, and the power button on case does nothing. What am I to do? I need this computer for Uni, and I don't have much time left before I start falling behind on work.
Old PSU: Corsair cx450
New PSU: Thermaltake toughpower SFX600W
motherboard: Gigabyte aorus b360 gaming 3
CPU: I5 8400
GPU: GTX 1060 6GB
RAM: 16GB