Jump to content
Search In
  • More options...
Find results that contain...
Find results in...

CPU fan spins then stops on startup & keyboard/mouse/monitor don’t work


Relatively new to PC building. I just upgraded my motherboard and cpu today and performed a BIOS flashback to update the new motherboard to support the new 5800x cpu. I waited till the flashing green BIOS light turned off, indicating it had been updated, and started my computer.

The computer turns on, the cpu fan starts up for a second then stops, the keyboard/mouse/monitor do not work. When turning the computer off, the cpu fan starts up again for a second then shuts off again.

Specs: •Ryzen 7 3700x    Ryzen 7 5800x

•Asus Prime A320mk    Asus TUF Gaming b550M Plus

•16gb ram 3000 DDR4

•GeForce GTX 1650 X 4GB

•500W PSU

Any suggestions on what to do? I’m not sure if I’ve messed up somewhere or missing something?

Link to comment
Share on other sites

Link to post
Share on other sites

How long have you tried or let it go? This sounds like normal Asus while it trains everything. Can take a few reboots itself and a few minutes of doing this. 

PSU Tier List Thread | Community Standards | Fan Control Software

Please make sure to Quote me or @ me to see your reply!

Just because I am a Moderator does not mean I am always right. Please fact check me and verify my answer. 


"White Ice"

Ryzen 9 5900x | Asus Crosshair VIII Hero (Wi-Fi) | EVGA RTX 2080ti | Ballistix 32gb 16-18-18-36 3600mhz | Custom Water Loop | 1tb Samsung 970 Evo

2x 2tb Crucial MX500 SSD | Fractal Design Meshify S2 | Corsair HX850 PSU | 3x Corsair LL140 | 3x Corsair LL120


Dedicated Streaming Rig

 Ryzen 7 3700x | Asus B450-F Strix | 32gb Gskill Flare X 3200mhz | Corsair RM550x PSU | Asus Strix GTX1070 | 250gb 860 Evo m.2

Phanteks Enthoo Evolv |  Elgato HD60 Pro | Avermedia Live Gamer Duo | Avermedia 4k GC573 Capture Card


Link to comment
Share on other sites

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now