Problem with a Squeezebox Boom. Not sure what triggered this, but possibly a failed firmware upgrade.

Right now when powered on the display does not light at all. The individual buttons (1, 2, Back, Play etc) are all illuminated, but nothing happens when they are pressed.

I have tried the two reset procedures described in the Wiki - that is to power on while pressing the 1 (one) on the remote (and also pressing the 1 button on the unit). And also tried same but with the + (plus) key on remote and unit. Regret no response to any of these.

Other devices (Radio and Squeezebox Classic) running fine. Squeezebox Server at version 7.5.2, hosted on a QNAP 509 Turbo.

Anything else I can try to revive the Boom? Feels rather Bricked otherwise.

Thanks.