Best regards, I have a problem with a 1420 since it has firmware 3.9 and only accepts tls 1.0 connections to be managed, and this has been deprecated by almost all browsers. I thought about updating it to the latest version, however I don't see a procedure to do so since the guide is made for firmwares 4.5 onwards. Is it possible to update a 1420 from version 3 to 4? MODEL:1420A3A3AN6WL2. greetings.