Question MSI B450M Gaming Plus not posting

[TheFlaked]

Setup:
CPU - Ryzen R5 3600
GPU - AMD Radeon RX 580
Mobo - MSI B450M Gaming plus
PSU - Be Quiet 530W
Ram - Corsair Vengeance LPX Black DDR4-3200

When i turn on the PC all fans start Spinning, the Debug LED's turning on and off after about an second. However i have no power at the USB Ports and no video Signal at all, neither at the Mobo or the GPU. Ive already updated the BIOS but that only fixed another issue with the CPU debug light, now all debug lights are off. Ive tried everything suggested in the Forum but Nothing really helps. Maybe someone of you can Help me?

Fixing attempts:

• Build the pc outside of the case with just enough conpinents
• removing CMOS battery and fleezing the PSU
• trying out the ram sticks, all sticks at all ports, with two and one stick.
• removing GPU and only using the CPU / Mobo
• checking all cable connections

I dont have ans other hardware to check it out with different hardware, so im not able to do that.

Thanks in advance, Jakob

 

[NightHawkRMX]

Use bios flashback again to retry flashing it. Try bridging the clear CMOS pins for 5 seconds.

You won't boot without a GPU, put it back in.

 

[TheFlaked]

Ive already placed tue GPU back in Position.

Ive tried to Flash the Bios again, but nothing happened. The same for bridging the Cmos PINs.

 

[NightHawkRMX]

Ive tried to Flash the Bios again, but nothing happened.

Do the lights flash like they should?
Do the lights flash indicating a successful flash?

 

[TheFlaked]

Yes, the pc is "trying" to reboot afterwards