I can confirm given EC ROM is corrupted and makes machine dead. My original EC ROM is working but freeze machine on HP logo after I updated main BIOS... Just in case attaching my EC..
I flashed vinafix.com_clear me.bin machine starts to work fine but keyboards backlit is not working. Reinstalled ATK with no luck - every Fn shortcuts are working except backlit. Any ideas?
Here is ROM for Macpro5.1 but 2010 from 820-2337-A board, I tried it on Macpro4.1 and it's works great. High Sierra also works fine with it.
Please note - Serial Number replaced with XXXXX, maybe you need to edit it.
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