Boot problems with PC

[Shion]

I suddenly got this problem on my pc

when I power on it

it boots up but there's an underscore blinking on the upper left of black screen

& this is the worst part, when i plug in any usb mouse or keyboard or flash drive it freezes on gigabyte logo but it boots when i use ps/2 k&m port & yes still black screen with underscore blinking 

 

things i did after this happened 

1.clr_cmos

still black screen

2.replaced ram sticks with backups

still black screen

3.used other hdd with working W10

still black screen

 

My pc parts

Case: Acrylic mid tower 

Motherboard: Gigabyte GA-990FXA-UD3 3.0 

CPU:FX-8320 8core.

Cooler:Cooler Master Seidon 120V

RAM: 2x4GB Kingston & 2x4GB Kingmax 

GPU:Sapphire HD6570 4GB

PSU:Cooler Master 650v 80+Gold semi-modular 

[Shion]

1 hour ago, Not Wills said:

boot media issue, it cant find anything to boot to.

I replaced my hdd with a backup one with working w10 but still blackscreen when it boots

[Shion]

24 minutes ago, Not Wills said:

boot media with the bios and motherboard, try reset the cmos, if that doesnt work, i think you will need a new motherboard

I already did reset the cmos

but still the same

so basically my motherboard is unusable or dead now

 

I guess I'll have to check prices of these two motherboards 

Gigabyte 990FX-Gaming 1.1

Asus TUF sabertooth 990fx r3.0

[TheRandomness]

- Thread moved to Troubleshooting. I can recommend having more verbose titles compared to just "Help" in the future, if need be.

[Shion]

31 minutes ago, Not Wills said:

boot media with the bios and motherboard, try reset the cmos, if that doesnt work, i think you will need a new motherboard

Also what happened why I can't plug anything on usb ports?

it just freezes on gigabyte logo