Please have a look at the below checklist to ensure everything is properly set to run the firmware update on your Expert. If for any reason the upgrade process doesn’t automatically start, please make sure you have followed the upgrade instructions detailed above.

Has the SD card been properly inserted?
The SD-Card has to be inserted with its contacts facing up in its slot located at the rear of D-Premier and with contacts facing down for 120, 200, 250, 400, and 800 models. Make sure it is inserted all the way until it locks into place.
Are you using an appropriate SD card?
If you run a 5.4 or previous firmware version, make sure you use a regular 2GB SD card and not an SD-HC card. In some rare cases, you will have to try with another SD-Card as a specific card's reading speed can occasionally prevent the D-Premier from properly reading its content. If you run a 5.5 or higher firmware version, regular 4GB and SD-HC cards will work.
Is it formatted the right way?
Make sure the SD card is formatted in FAT or FAT16—we advise you to reformat it on the same computer you use to generate the files on.
Have you properly copied the upgrade files to it?
Ensure the files have been copied to the root directory and not a sub-directory of the SD card and that they have not been renamed or their extension changed. They should be directly saved from the website or extracted from the downloaded ZIP file to the SD-Card. For example, opening them first on a Mac and then copying them on a PC connected to the SD card can cause problems.
Note: Once the upgrade has successfully been performed, please remove the files from the SD-Card.
I have a Dual mono Expert (composed of two devices) - any specific instructions I should follow?
In a Dual Mono device, it's important to make the firmware update on both devices. One single SD card is enough to run the update on both devices, but you will need to update one device at a time in this type of configuration.
Note: If you intend to use the same SD card for both devices, please make sure that you protect the SD Card from being written to because, during the update process, we delete the boot file on the SD card. This is done to prevent your Expert from repeatedly attempting the same update every time it reboots, in case you haven't removed firmware files from the SD card. As a result, when you attempt to run the update on the second device, it won't start automatically.
Be careful not to lock writing on your SD Card, which you enable by sliding down the lock switch on the left part of the SD card.

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