I can’t see the specific post you have in mind, but based on that firmware string, here’s what’s typically discussed in forums:
Most 1509-series receivers support updates via USB. Follow these steps carefully to avoid "bricking" your device:
: Built-in support for YouTube, IPTV, and Megogo (often requiring a separate USB Wi-Fi dongle like the RT5370). Interface : HDMI 1.4a and AV-out for older televisions. firmware 1509-dvbt2-512m
Aggiornamento firmware 1509 dvb t2 512m * mcgaiver. * Data di inizio 23 Giugno 2023. Digital-Forum
Because these boxes are often generic (no-name brands from various manufacturers), there was rarely an official "Update" button. The story of this firmware lived on: I can’t see the specific post you have
If a user attempted to install a "256M" version on a 512M device (or vice versa), the result was almost always a "brick"—a hardware device that became as useless as a literal brick.
ensures stable performance for large memory handling during channel scanning and media playback. Where to Find & How to Update Aggiornamento firmware 1509 dvb t2 512m * mcgaiver
This specific 1509-DVBT2-512M firmware became a "holy grail" on tech forums for users trying to recover their boxes after a failed update or to unlock features like YouTube support via USB Wi-Fi dongles. The Community "Underground"