LEGO® Answers is a question and answer site for LEGO® and building block enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have prepared a SD card to run Lejos on EV3, as said on Lejos Sourceforge page and I'm about to test it. What worries me - will I still be able to go back to original Firmware if something goes wrong or I'd like to go back to this original Lego visual building software? Will removing SD card be sufficient?

Thanks for any information.

share|improve this question
You should be able to switch back to the original firmware without too much trouble - whether it's as simple as removing the SD card, or if there's a more involved process, I couldn't say. – Zhaph - Ben Duguid Oct 7 '13 at 15:37
already tested it, right. removing SD card was enough :) – Jakub Oct 8 '13 at 18:31
up vote 4 down vote accepted

I tried Lejos and removing the SD card and rebooting was enough to go back to original firmware.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.