I managed to brick my S5 while trying to install a fan speed control update through the regular upgrade interface. Now, when I reboot it, the fans go into overdrive and it won't boot the operating system. Is there any way to access the device through an SD connection or any onboard connector to reload the correct boot file? I can't seem to find a common SD slot or connector, but maybe I'm just overlooking it. Appreciate any help!
Is that the miner with a Beaglebone board? it should have an SD card slot inside what I heard before is that you need to reimage the Beaglebone board in order to do that you will need the SD card firmware from Bitmain which is still available on their download page.
Here's the direct link https://file12.bitmain.com/shop-product/firmware/Tools%20and%20Instructions%20to%20Image%20SD%20card.zip
The tools and the firmware is already on that file just extract them you will need an SD card reader to burn the img file to your SD card use the diskimager to burn it to your SD card.
You can follow the guide here https://bitcointalk.org/index.php?topic=1512744.msg15218516#msg15218516
It's s7 but the guide should be also working on s5 after you flash it and upgrade it through WebGUI with the latest firmware available on Bitmain.