Thank you for contacting the Intel Communities.
I am sorry to hear that this has happened with your Intel® Compute Stick.
I would like to recommend you to perform a BIOS recovery to the version you attempted to update to.
Here you can find the instructions to perform this task: BIOS Recovery Instructions for Intel® Compute Stick
I look forward to your outcome with this.
There is no display output from either of the compute sticks, so I am unable to see the prompts for performing a BIOS recovery.
Why are the STK1AW32SCR sticks only displaying to the HDMI port on the first boot and then they stop?
Thank you for your answer.
As per the troubleshooting done so far, I would like to recommend you to check with the place of purchase of your device to get a replacement (if within the first 30 days after the date of purchase).
If more than that, please contact Intel Customer Support at: Contact Support