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3 chains gone here as well.

Followed all instructions provided by the Bitmain Support page to upgrade to latest firmware with SD flashing, but i wasn't able to flash the E3 somehow even i made it step by step as suggested.

Can someone that managed the flashing through SD card make a guide/tutorial step by step? Pretty sure the Bitmain guide misses something or it would have worked out, not?

Thx in advance.

It just does not work. Even Bitmain said, it does not work. The E3 was the worst miner so far.

So nobody managed to flash the SD card so far? Seriously?

I have flashed from SD yesterday.
1.Unzip and copy T9+ firmware fails to SD. https://file11.bitmain.com/shop-product/firmware/t9%2B%20-SD%20Tools.zip
2. Insert SD and move jumper.
3. Switch miner on and wait 30 sec till blinking of both status lights simultaneously.
4. Power miner off, remove SD and move jumper to its original location.
Now you have fully functional T9+ control board which can be flashed by the E3 firmware.
5. Download E3 Firmware : https://file11.bitmain.com/shop-product/firmware/Antminer%20E3/Firmware/0072018071812344880187tM1RPd0668/Antminer-E3-20180806.tar.gz
6. Power miner up.
7. In Upgrade page select downloaded E3 firmware for flashing, uncheck "Keep settings" checkbox and flash firmware.

Ive recently had the dreaded socket error: connection refused error. Ive tried everything, finally got a board from eBay that already has the T9+ firmware on it. I cant get it to flash to the E3s. Ive tried this and the new version, but I keep getting an error saying cannot find signature. Any help would be greatly appreciated!!