crwdns2942213:0crwdne2942213:0
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This guide is for NXT bricks that have blank or flickering or dim LCD screens or dead areas.
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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.
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Undo four small cross heads under the batteries and remove the pale grey front cover.
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Undo two small cross heads either side of the screen.
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Very gently pry the speaker away from the white plastic case. It is held with a sticky foam pad.
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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.
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Unplug the 10 pin connector and lift out the screen/pcb assembly.
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lift the pcb from the bottom and slide it out and away so the ribbon cable is opened out and fully visible.
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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.
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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
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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.
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Repeat step 5 if necessary with more heat or pressure.
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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)
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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crwdns2947412:07crwdne2947412:0
Awesome! This works really well!
Awesome it worked !!!!
I have tried this and it doesn't work.. any ideas on what can replace the screen..
Tried it on 5 intelligent blocks where the display had failed. Sadly, it didn't work on any!! They have all gone in the trash
Oh that's sad, may not have had enough heat
Thanks for this! I have just managed to quickly return two of the NXT brain bricks to working condition thanks to this guide. I've used my SMD hot air soldering gun with 200°C with the air flow at 50%. To be honest, probably a hair dryer would do as well ;) I've used plastic Lego separator tool to pry the LCD ribbon down to the circuit board. The separator melted a little but it was worth it as both my NXT sets are fully working now!
Amazing! Thank you, I ordered 2 of these online and both apon arriving did not work and this fixed them both!
I couldn't get enough heat or pressure using a heat gun and a small ball end press, so I had a wood burner with a blunt end and I let it heat up and unplugged it and once it cooled enough so it didn't peel the plastic protector I firmly pressed it down with that and boom! Like magic!
