No authorization! firmware issue

[cliffyk]

If by "here" you mean this thread--the Read me please.doc file states:



Are you certain you used to correct files  from the Firmware for fixing 03 LCD frame shearing bugs( for M05 and older Version) folder?

IF you are still able to "print' files, I'd try loading the files from the Elegoo Mars V4.2.16 F2.7 .zip file linked to in the above referenced thread. It appears to be a revision (F2.7 v. F2.0) of the same version your printer thinks it has.

Let us know how it goes...

Words to the wise:

• NEVER load firmware from third-party sources, like the above referenced thread--always get them diectly from the manufacturer's site--or not at all;
  
• DO NOT FIX that which ain't broke--unless you are experiencing a problem the 'upgrade' claims to fix, or the update promises some feature you cannot live without--stay where you are;
  

This forum, despite it's name and the often great info available, is not an official Elegoo support site. It is a user forum unaffiliated with Elegoo; there should be a disclaimer or "sticky" topic stating this clearly; many (especially first time) posters do not realize that and believe thay are communicating with Elegoo (who do not even seem to frequent this forum).

Elegoo's completely unused Shopify "forum/community" board is here.