I may have flashed my BIOS incorrectly: need help

UPDATE: The distributor approved my RMA, and what's more even paid for return shipping! So I think it turned out pretty well and I learned a valuable lesson at the cost of delaying my build by a couple of weeks. 

Thanks John. I appreciate your helpfulness. I did follow all the instructions you mentioned. I didn't try removing the CMOS battery, but I've already shipped back the board. In the end it's my fault for not reading thoroughly enough. I will try my best to get a replacement but in the end I have to move on accepting a hard earned lesson. Thanks everyone for your help.

@MisterJ I got the same screen as in the screenshot. It's probably just that Windows flashing is not reliable. To clear CMOS I switched the jumper they mentioned in the manual.

@datonyb I have requested an RMA with the retailer. Let's see how that goes. Although shipping cost me a bit. If they refuse after inspection then I'll probably lose the shipping as well.

Coldblade, sorry the worst happened.  Did you get the screen shot I posted?  I suspect parsec is correct, but I would suggest you look at your BIOS chip and make sure it is soldered not plugged.  I would suggest you immediately open a ticket with ASRock technical support and see what support they will offer.  I, again, do not think you will have to buy a new board.  Please tell us how you cleared the CMOS.  Sorry and hope it turns out the best, John.

Coldblade wrote: Okay. So I rebooted and the worst happened. I don't get anything on my monitor. Is there anything I can do or is replacing the BIOS/MB the only option?

If you can't get anything on the monitor, then you are probably out of luck. You usually should not do this right after a UEFI/BIOS update, but you could clear the UEFI/CMOS, and see if you get a signal to the monitor. If you do then do the Instant Flash update method, exactly and ONLY as the instructions tell you to.

Earlier ASRock boards had replaceable UEFI/BIOS chips, but those types of chips are no longer available, the chip in your board are soldered in place.

Sorry to say, what you did with the Windows BIOS update download files was just plain wrong. No clue what the result will be, but it won't be good. Seems to be the case, sorry to say.

The latest Windows UEFI/BIOS version actually starts an AMI firmware update utility, and then runs Instant Flash. So it may not be as prone to errors as the earlier Windows versions were. But that won't help you now.