The "Firmware 51" usually refers to a specific release (often labeled as MXQ-s805-ota-20151231 or similar build numbers in that era) that was considered one of the most stable versions for the original MXQ boxes before the S905 chipsets took over.
Unlock the Full Potential of Your MXQ S805 with Firmware 5.1!
For the MXQ S805 TV box, the "5.1" firmware typically refers to the Android 5.1.1 Lollipop update. Because this hardware originally ran Android 4.4 KitKat, upgrading to 5.1.1 is often done via custom ROMs, as official stock support for this version is rare. Download Resources mxq s805 firmware 51 download link
In the world of Android TV boxes, Version 51 remains a phantom—a piece of code that everyone talks about, but no one actually has. Are you trying to recover a bricked device, or
If you cannot find a live link, consider retiring the S805 box and upgrading to an S905X3 or S905W2 device, which runs Android 11 or 12. Alternatively, use the "Amlogic Burn Card Maker" to try booting from an SD card rather than overwriting the internal NAND. The "Firmware 51" usually refers to a specific
WiFi Issues: If WiFi won't turn on after the update, your box likely has a different WiFi chip (like the RTL8723). You will need to find a firmware version specifically labeled with your WiFi chip's model number.
Enter Recovery Mode: Insert the SD card, hold the reset button (usually hidden inside the AV port) with a toothpick, and power on the device. No OTA Updates: Since Google has deprecated support
The community at China Gadgets maintains the largest archive of Amlogic firmware. Go to chinagadgetsreviews.com and search for "S805 firmware." Look for entries specifically tagged WIFI 8188 or WIFI 51.