How to Bypass “Can’t Find Signature” When Updating Antminer S19 Firmware

how-to-bypass-_can't-find-signature_-when-updating-antminer-s19-firmware

This guide will show you how to bypass “Can’t Find Signature” when updating Antminer S19 firmware.

When you see Bitmain Antminer S19 Backstage Shows “System Upgrade Failed: Unable to Find Signature!!!” always means the firmware you are upgrading is not a security firmware.

This issue, which still affects all BTC miners, is what we will discuss today.

Note: This operation carries some risk, and you are responsible for any consequences.

Read more: Bitmain Antminer S19 Series Can’t Upgrade Firmware/firmware Upgrade Failed

The specific operation steps are as follows:

1. You will need to use an SSH tool like putty;

2. Enter the IP address of the miner in putty and reserve port 22; if a message pops up, click Yes;

3. Enter the miner page with the credentials root and admin.

4. Copy and paste this line of code;

Code:

cd /www/pages/cgi-bin

After the input is complete, press Enter; you will see the following page:

Auto Draft

5. Enter the following;

Code:

vi upgrade.cgi

6. Use the down arrow and find this code;

Code:

Auto Draft

7. Click “i” on the keyboard to enter edit mode;

8. Change the code in step 6 to this code;

No code needs to be changed or added; more details are provided in the comments below the code.

Auto Draft

Note: Add # to the first 15 lines and remove # from the following 5 lines

The miner will only ignore the IF function searching for the signature if you add a #, which indicates that the line is commented and won’t be executed.

Press the keyboard’s ESC key (exit) while editing the code.

9. Input

Code:

:wq

and press Enter to upgrade and save the file.

10. Input

Code:

:q

and press To save the SSH session, press enter.

11. Flash the updated Antminer S19 firmware.

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