SOLVED Built new PC, it powers on and fans on, BUT won't power on HDMI monitor, USB keyboard, and USB mouse (streamable.com)

submitted 10 months ago* (last edited 10 months ago) by lindafjwj@lemmy.today to c/techsupport@lemmy.world

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SOLVED by @jj122@lemmings.world

Make sure all power connections on the mb are made (there are more than just the 24 pin).

I hadn’t connected the PSU CPU cable. Now it works: https://streamable.com/9bwg1k

Also thanks guys for suggesting the dual channel slots spacing between the memories.

Thanks everyone. You're all wonderful.

See video https://streamable.com/agio65

PC SPECS:

CPU: Intel Core i9-12900K
iGPU: Intel UHD Graphics 770
Motherboard: GIGABYTE B760M AORUS ELITE (manual)
Power supply unit: Corsair CV 650
Primary memory RAM: CORSAIR Vengeance 32GB DDR5 (2 x 16GB)
Secondary memory SSD: Western Digital WD BLACK SN770 M.2 2280 1TB
CPU Cooler: Cooler Master Hyper 212
Case: Corsair 220T RGB
Monitor: LG 24MK430H 24"
Keybaord: Logitech K120 USB

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[-] themoonisacheese@sh.itjust.works 5 points 10 months ago* (last edited 10 months ago)

Locate you POST diagnosis LEDs (usually top right of the motherboard). Are any of them on? If so, there's your problem. Would help to have more info like config and where you plugged everything in.

Edit: probably not your problem right now but I can tell you straight away you plugged in your ram wrong. If you only have 2 sticks, they should never be touching, to take advantage of dual-channel. Refer to your motherboards manual on how to install ram. Also refer to your motherboards manual's troubleshooti'g section, maybe there are elements you should look at mentioned there.

[-] lindafjwj@lemmy.today 2 points 10 months ago* (last edited 10 months ago)

Locate you POST diagnosis LEDs (usually top right of the motherboard). Are any of them on? If so, there’s your problem.

I found multiple supposedly LEDs both at the top right and bottom right, but none of them are on.

Would help to have more info like config

CPU: Intel Core i9-12900K
iGPU: Intel UHD Graphics 770
Motherboard: GIGABYTE B760M AORUS ELITE
Power supply unit: Corsair CV 650
Primary memory RAM: CORSAIR Vengeance 32GB DDR5 (2 x 16GB)
Secondary memory SSD: Western Digital WD BLACK SN770 M.2 2280 1TB
CPU Cooler: Cooler Master Hyper 212
Case: Corsair 220T RGB
Monitor: LG 24MK430H 24"
Keyboard: Logitech K120 USB

and where you plugged everything in.

What exactly do you mean?

you plugged in your ram wrong. If you only have 2 sticks, they should never be touching, to take advantage of dual-channel. Refer to your motherboards manual

thanks, I just set it according to mobo manual pg 15 for 2 modules