M91S won't boot

Hi all,

Someone asked me to try to fix a M91S that won't boot.

I'm unsure how the device got in this state; according to the owner it just stopped working.

The progress bar on the bottom of the screen fills up all the way, but then nothing happens.

The reset button is working.

The device does detect update zip's on the sd card, but then always says "no update available, starting device.." , after which nothing happens anymore.

I did find a few mentions of similar problems on the M92, but all the links to update-20120309.zip that is supposed to fix it, are dead. And i suppose M92 zip's won't work on the M91S anyway?

Any ideas?

thanks!

Oele