I'm a first-time PC builder, and after assembling everything, my new computer won't turn on at all. There are no fans spinning and no lights – it's like I never hit the power button. I'd really appreciate any guidance!
Here's what I've checked:
- The power supply is correctly connected to both the motherboard and graphics card.
- I've also looked over the front panel connections.
Here are my specs:
- ASUS B850-F motherboard
- Gigabyte RX 9060 graphics card
- Ryzen 9600 processor
- 16GB DDR5 RAM
- Thermalight AIO cooler
- MSI power supply
2 Answers
Have you remembered to switch on the physical power supply unit (PSU)? Sometimes it’s easy to overlook that switch -- make sure it’s on!
Also, double-check that your RAM and CPU are seated properly. I've had issues where things seem right but upon rechecking, they weren’t fully in place.
This is a common issue for first builds—it can be pretty frustrating. There are many possible reasons for it not powering on. I suggest inputting your components and situation into a troubleshooting site like Grok for a more comprehensive list of things to check. And if you’re still stuck, it might be worth taking it to a local computer shop for some professional advice.
That sounds like a good idea. I’ll definitely look into that!

Yes, I did check and it’s on.