Msi b450 bios problem and no display

Feb 7, 2019
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My pc wont boot and no display detected

all hardware works well (tested)
RYZEN 5 2600X
MSI B450 GAMING PLUS
KLEVV SSD NEO 120GB
WD BLUE 1 TB

im pretty sure it was the BIOS problem.I've tried the bios flashback feature but still doesnt work for me.and Plug off the cmos battery still doesnt work in my case.

when i touch the bios flashback button, my pc start for a while and suddenly shut down with the bios flashback led solid red

note : my usb (FAT32) for the BIOS FLASHBACK have installed the right BIOS for MSI and also renamed as MSI.ROM

what should i do?

PLEASE HELP
 
DRAM LED solid red, but about a weeks ago i've fixed this same issue with BIOS Flashback.But unfortunately i forgot to save the new bios to my system and my pc wont boot and no display
 


i've tried but still my pc doesnt boot aswell, and my motherboard doesnt even have a jumper

 


is removing the powercord really important? i forgot that step btw.i just removing my cmos battery but not removing my powercord

and after removing cmos battery, what should i do? normal boot?