AB350m Pro4

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   Hello,

I tried updating the bios of my AB350m Pro4 to 4.30, however I have a black screen on boot and no post now. Here is the process I took to update the bios from 3.30:

 Format thumbdrive to FAT32, copied over 3.40 bios

Reboot into bios, set factory defaults, save and restarted into windows

Reboot into bios, use instant flash tool with 3.40 bios on thumbdrive

Boot into windows, download 4.30. Remove 3.40 from thumbdrive and copy 4.30 over

Reboot into bios, check bios version, flash 4.30. Nothing abnormal happens, computer is on battery backup

Computer reboots and fans just cycle full blast to normal. Keyboard 
does not light up, no video output. I let it do this for an hour.

Next, I tried to clear cmos, no dice. Try different sticks of 
memory, different dimm slots, and  video cards, still no post.

Now I'm letting it sit with the power unplugged, cmos jumper set, cmos battery pulled.

I'm waiting till after work to try and see if it boots up after sitting for five hours. Please let me know if anyone has any ideas or if this will just need to be serviced. Below are my system specs:

Ryzen 7 1700
AB350m Pro4
2x Gskill F4-3200C16D-16GVKB
3x Samsung 500GB 850 EVO
1x Samsung 512GB 960 PRO NVMe
Sapphire R9 Fury X
Corsair CXM 750W

Thank you in advance for your time!