Check the following potential causes and solutions if you are unable to upgrade the Antminer L7 firmware or if the upgrade has failed.
Incorrect Firmware Version
As determined by the model of the miner, make sure you are upgrading the proper Antminer L7 firmware version.
Security Firmware V.s. Non-security Firmware
If the miner backstage shows “Failure of System Upgrade – Unable to Find Signature!!!” The firmware you are upgrading is not a security firmware, so that’s what that means.
What is Antminer L7 Security Firmware & FAQs
An Incompatible Browser Or a Browser With Excessive Cache
Use various browsers to test; Firefox or Google Chrome are recommended. If clearing the cache doesn’t work, try using a different computer or laptop.
The Miner Has Been Hacked
For more details, read this article: Viruses, Malware and Remote Attacks on Bitmain Antminer L7 – How to Prevent and Remove Them?
The Control Board Has An Issue
Solution:
a. resetting the control board;
b. use the SD card to recover the program;
c. replace with a good known one to test.
Note: Warranty policy explanation on returning control board only
Please get in touch with us if you have any further inquiries so we can help.
