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LEGO Mindstorms NXT Brick Screen Replacement

Introduction

NOTE: I made this duplicate guide because the other guide, which was made in a different language, did not allow me to move it under LEGO.

  1. Careful: steps 1-7 are sourced from a guide that's marked as in-progress.

    LEGO Mindstorms NXT Brick Screen Replacement, Diagnose LCD screen problem.: step 1, image 1 of 1

    • This guide is for NXT bricks that have blank or flickering or dim LCD screens or dead areas.

    • Your brick should power up as normal - making the opening 'chime' and the usual button-press noises, but have issues with the screen - if you are getting nothing at all (check the batteries!) or a very quiet steady clicking noise it is probably a firmware problem so try and update or fix that first.

    Edit

  2. LEGO Mindstorms NXT Brick Screen Replacement, Open the case: step 2, image 1 of 3 LEGO Mindstorms NXT Brick Screen Replacement, Open the case: step 2, image 2 of 3 LEGO Mindstorms NXT Brick Screen Replacement, Open the case: step 2, image 3 of 3

    • Undo four small cross heads under the batteries and remove the pale grey front cover.

    • Undo two small cross heads either side of the screen.

    Edit

  3. LEGO Mindstorms NXT Brick Screen Replacement, Free the speaker and its cable.: step 3, image 1 of 3 LEGO Mindstorms NXT Brick Screen Replacement, Free the speaker and its cable.: step 3, image 2 of 3 LEGO Mindstorms NXT Brick Screen Replacement, Free the speaker and its cable.: step 3, image 3 of 3

    • Very gently pry the speaker away from the white plastic case. It is held with a sticky foam pad.

    • Move the speaker and its wires aside and cut a small channel in the plastic to allow the cables to pass through. TAKE CARE NOT TO CUT THE CABLES.

    Edit

  5. LEGO Mindstorms NXT Brick Screen Replacement, Remove the screen and pcb from the brick.: step 4, image 1 of 3 LEGO Mindstorms NXT Brick Screen Replacement, Remove the screen and pcb from the brick.: step 4, image 2 of 3 LEGO Mindstorms NXT Brick Screen Replacement, Remove the screen and pcb from the brick.: step 4, image 3 of 3

    • Unplug the 10 pin connector and lift out the screen/pcb assembly.

    • lift the pcb from the bottom and slide it out and away so the ribbon cable is opened out and fully visible.

    Edit

  6. LEGO Mindstorms NXT Brick Screen Replacement, Heat and then apply pressure to ribbon cable connection.: step 5, image 1 of 2 LEGO Mindstorms NXT Brick Screen Replacement, Heat and then apply pressure to ribbon cable connection.: step 5, image 2 of 2

    • I protected the LCD screen itself with a silicon baking mould (not sure if that was necessary!) Heat the part of the ribbon cable that attaches to the pcb. I gave it 10 secs with a small heat gun.

    • Apply pressure to the area - You want to avoid puncturing the shiny protective cover-tape but to compress and hopefully re-connect the tiny terminals underneath. There are about ten of them, so i used the sharp end of a spudger and rubbed back and forth parallel to the ribbon

    Edit

  7. LEGO Mindstorms NXT Brick Screen Replacement, Partially reassemble to test.: step 6, image 1 of 1

    • Re-fold the ribbon cable under the screen and replace the PCB just enough to be able to re-insert the 10 pin connector. put some batteries in and test the screen.

    • Repeat step 5 if necessary with more heat or pressure.

    Edit

  8. LEGO Mindstorms NXT Brick Screen Replacement, Reassemble: step 7, image 1 of 1

    • Remember to thread the speaker cable back through the channel you cut and carefully re-stick it to the white plastic housing. Be careful not to put pressure on the face of the speaker - delicate)

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

Author

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tayola

Member since: 07/21/22

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