How to update bios without a compatible cpu

[Lemmein]

I got 13400f and asus b660m-k

 

The monitor and peripherals aren't turning on which made me suspect a bios update is needed

 

Do I have to go somewhere to find a compatible cpu and update the bios or can I do something without having to go outside?

 

I can't find the Asus usb bios flashback in the features of the mobo, no luck? 

[StDragon]

The MB doesn't look to have Flashback. Only Flashback can flash a BIOS without a CPU installed.

[Lemmein]

3 minutes ago, StDragon said:

The MB doesn't look to have Flashback. Only Flashback can flash a BIOS without a CPU installed.

And how can I make sure that's actually the problem? The bios update? 

[Wolly9102]

4 minutes ago, Lemmein said:

And how can I make sure that's actually the problem? The bios update? 

check the label on the board. If it's lower than 1620 and never been updated it's the bios.

 

https://www.asus.com/support/FAQ/1044755/#:~:text=The bios version is bottom,shipped with bios version 0403.

[StDragon]

Right, 1620 was released in August of 2022. Current BIOS rev is 2403 released April 2023.