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I am not an expert on this. Just found this in one of the problem. While you are waiting on help from EV3 supplier as the previous reply suggested, you might want to try this. I found it one of the online forums. It is not stated here but I think you will need to connect your EV3 to your PC and also start the EV3 program on your PC so that the Download is possible (unless you have WiFi enabled on your brick).
If for some reason your EV3 Brick stops working during the firmwareupdate process, you will need to manually update the firmware bydoing the following (the EV3 Brick still needs a USB connection toyour computer):Hold down the Back, Center, and Right buttons on the EV3 Brick.When the EV3 Brick restarts, release the Back button.When the screen says “Updating,” release the Center and Right buttons and click the Download button in the Firmware Update tool. The firmware will be downloaded to your EV3 Brick, which will restart itself.If the manual firmware update does not make your EV3 Brick workthe first time, repeat the manual update process.
Best Regards,VinayakCoach - Lego Legends, South Riding, VA
> Date: Sat, 4 Oct 2014 10:34:56 -0400
> From: [log in to unmask]
> Subject: [VADCFLL-L] Help! EV3 brick gave up on us!
> To: [log in to unmask]
> 
> Hi,
> 
> Can anyone advice how to revive EV3 brick. This morning it just won't go past the red light. We removed batteries changed into new also tried using the trick of holding the three buttons on the brick down yet it still does wake up.
> This is a big disaster for our team as they really put their heart and soul programming. Not sure how can a brand new brick decides to stop working. Kids were extremely careful with it all along.
> 
> Can any fellow EV3 user or experts please help us out with some advice.
> 
> Thanks,
> Mrudula 
> 
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