If a firmware update has been attempted and the console appears to be unilluminated with a dead screen, it is quite possible that the software you have downloaded has not been extracted properly giving the console an appearance of a major fault.

When you downloaded the firmware it should appear in your downloads folder wrapped up in a ZIP file as seen below:

You then need to extract the .wingfw file from the ZIP file as highlighted in blue...

...and put it on to your desktop

Then drag and drop the .wingfw file in to your WING OS folder,....if the complete ZIP file is used in error then it will fail to update and cause the above symptoms.

To check you have performed the update process correctly, download the latest WING firmware from here.

Then follow the process in the useful video: