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
 
Feb 7, 2019
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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
 
Feb 7, 2019
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i've tried but still my pc doesnt boot aswell, and my motherboard doesnt even have a jumper

 
Feb 7, 2019
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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?