I have a Mac Pro 4,1 to 5,1 single Hex cpu model. I've posted before about my sleep indicator light always being on solid, even when shutdown and it stays solid during sleep. However, another thing I've noticed is that the EFI DONE LED on the backplane is lit green very faintly even when shutdown and it flickers when the machine is on. Everything else seems ok, with no red LED's lit. I've tried all the basic troubleshooting procedures like resetting the SMC, PRAM, removed the CMOS battery and removed HDD's and PCIe cards. Any thoughts as to what's to what's causing these issues? Could the firmware or SMC be corrupted? It runs fine otherwise, but I didn't always have this problem with the SIL and it functioned correctly after I flashed it to a 5,1 years ago.
This potato-quality picture is with the Mac Pro shutdown, but plugged in. The SIL is solid and the EFI DONE LED is dim.
This potato-quality picture is with the Mac Pro shutdown, but plugged in. The SIL is solid and the EFI DONE LED is dim.