Question New PC build not working

[Arcgar]

I'm not sure if this is the right spot for this but, I just built a PC for the first time and I'll get power, but no peripherals will work (monitor, mouse, keyboard)

The motherboard came with a speaker but I've heard absolutely nothing from it. At this point, I've removed all components. GPU, ram, fans (except cpu fan), storage, and the cmoss battery. I do have the 8-pin CPU power cable connected, I didn't miss it, and the larger power cable to the motherboard. I checked with my phone charging cable, and the USB port on the motherboard does get power. All parts are new except the storage and GPU.

At this point I have to assume it's the CPU and motherboard, but everything I've looked at says they're compatible. Maybe I'm looking in the wrong places, so the parts are listed below. I did look into bios flashback but I can't find a button for it anywhere so I'm not sure my mobo supports it. I'm fairly sure my CPU isn't damaged because I had no issue getting it inserted and knew to line up the appropriate corners.

TUF B450-plus gaming motherboard
Ryzen 5 5500 6-core 12-thread with wraith cooler
Corsair RM850 fully modular atx power supply
G.Skill Ripjaws ddr4 16gb
ASUS Strix 1050ti
1 SSD & 1 HHD
Case is NX410 antec mid-tower


At this point I'm not sure what to try but mostly I don't understand why I can't get anything out of the speaker that's meant for troubleshooting.

 

[rgd1101]

full system spec? include brand and model of the psu
motherboard probably need bios update to support r5 5500

 

[Arcgar]

The PSU is Corsair RM850 fully modular ATX power supply, and I added the other parts to the original post.
I thought that might be the main problem, but without display and without bios flashback I don't know how I would be able to update it.

 

[logainofhades]

The PSU is Corsair RM850 fully modular ATX power supply, and I added the other parts to the original post.
I thought that might be the main problem, but without display and without bios flashback I don't know how I would be able to update it.

Your two options are either get an older gen CPU, to update the bios with, or get a B550 board, with bios flashback capability. All of Gigabyte's 500 series AMD boards have it. Asrock has none, that I know of. MSI and Asus probably have some, but I don't know any particular models that do. Personally, I would go the different board route.

 

[punkncat]

Check your CPU compatibility list for the cheapest Athlon you can socket in on the presumable first BIOS revision and use it to update. It would be cheaper than taking it to a shop to do it.