msi z77a-g45 99 boot code

[kurora]

hi everyone

needs help here

 

i just bought an used msi z77a-g45

the sellers said the motherboard is works fine

but when its arrive at me i installing everything

it wont POST, on screen appearing a 99 code on bottom right corner of the screen,

 

what ive tried

clear cmos from the button on the motherboard

remove and place again the cmos battery

cleaning ram

use igpu and my rx 580

removeing all port like sata usb 3 front but the power and other is still plugged

 

i wrote some cases said that the motherboard was dead

 

the sellers gave me a 3days warranty, if the product not work i can return it

 

what should i do ?

thaankss for the help ;))