The downgrade patch simply overwrites the firmware version number, allowing the installation of any compatible firmware version. The Media Nav firmware doesn’t allow downgrading by default; it compares the current version number with the version number of the firmware located on the flash drive, in the upgrade.lgu file. Thus, it wouldn’t be possible to install, for example, version 4.0.6, if the current version is 4.1.0.
1. This patch does not alter the official firmware and only changes the version number.
2. This patch applies only to first and second generation Media Nav units (MN1 & MN2).
|Media Nav Version||New Firmware Version||Compatible Firmware||Download Link|
|MN1||1.0.0||ALL (1.0.2 – 4.1.0)||DOWNLOAD|
|MN2||5.0.0||ALL (5.2.7 – 9.1.3)||DOWNLOAD|
Note: This guide applies only to first and second generation Media Nav units (MN1 & MN2).
– a tablet, laptop or desktop equipped with an USB port
– USB flash drive, FAT32 formatted, max. 32 GB capacity
Step 1. Download the downgrade patch from the link in the table above, according to the Media Nav version.
Step 2. Extract the ZIP archive and put the file upgrade.lgu in the root of the flash drive – the file should be the first to be seen upon accessing the flash drive.
Step 3. Turn on the Media Nav and insert the flash drive in the USB port.
Step 4. Press Upgrade on the update notice. If no notice appears, go to Settings > System > System version and press Upgrade once the notice is shown.
Step 5. The Media Nav will reboot and the firmware version will be changed. After the change is complete, the unit will reboot once again and go to the main interface. At this point, any compatible firmware version can be installed, even if it’s older than the current one.