Try this to upgrade the ME firmware on a Z820:
As you noticed, there is a 3 pin header E1 located near the edge of the motherboard, between CPU0-DIMM1 and the power connector P3.
- Power down the Z820 first. Then move the jumper on E1 to pins 1 and 2. (pin 3 is closest to the CPU DIMM connector) The jumper on pins 1-2 enables flashing the ME firmware.
- After moving the jumper, then power up the system. Note: The system only reads the position of this jumper on power up (maybe reset?), so don't move it while the system is running.
- Now try to flash the ME firmware.
- If the ME flash worked, then power down the system. Move the jumper on E1 to pins 2 and 3. This enables ME. (Note: ME is disabled with the jumper on pins 1-2)
- After powering up the system after flashing and moving the jumper, the system may power down and up and reboot a few times. This is normal.
I am not an expert on ME firmware, but I am fairly certain this will help. E1 is highlighted in yellow below, pin 1 is on the left.
