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The screen on my LEGO MINDSTORMS NXT brick has just stopped working. It is either flickering, or blank. I have tried turning it on and off, installed fresh batteries, and I can even hear the selection sounds. Additionally, it responds regularly when I connect it to my computer. I've had my NXT for three-and-a-half years, so it's not new. Is there an easy/feasible way to fix it, or a cheap way to get it replaced?

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up vote 8 down vote accepted

Here are the two easiest options:

1: Repair it. If you have a soldering kit, then get it out, and follow the instructions in this video. It worked for me the first try.

2: Replace it. Contact LEGO, and tell them of your problem. I've hear many success stories from people who did this, and LEGO replacing it for free. For one person, it took a week to arrive, but for another, three days. Note that if you want to keep your old NXT, you'll have to have the receipt. If you don't have the receipt, then you'll have to send them your deffective NXT. Also, if you did not buy your NXT directly from LEGO, (i.e. Ebay) they will not replace it for free, but rather ask that you pay them to repair it.

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I would recommend option 2 first. LEGO does have a nice customer serviec and they'll probably replace it without discussion. However, they want want to ask for the faulty part to be returned, and if it has be tinkered with, they may not be super happy about it. Keep the soldering iron for when LEGO absolutely doesn't want to replace it (never). – Joubarc Nov 20 '11 at 9:38
I disagree. Mine recently gave out when I was right in the middle of making a robot. I wanted to get back to building my robot as soon as possible, so I soldered it. It only took about ten to fifteen minutes to heat it up the soldering iron, disassemble the NXT, solder the capacitors, slightly reassemble it the NXT, test it, and finish reassembling it. It's really not that risky if you know what you're doing. I much prefer soldering it over having to wait a week or so. – HaydenStudios Nov 20 '11 at 17:48
As you said, "if you know what you're doing" (I sure wouldn't). Wait... you've only got one? ;) – Joubarc Nov 20 '11 at 18:13
@Joubarc No, I have two NXTs. Sorry, I should've said "one of mine" Instead of "mine". And now I understand better what you're saying. – HaydenStudios Nov 20 '11 at 22:21
@HaydenStudios As Joubarc said, I would swap the two steps around, especially if your answer is to be valuable for future visitors to this question. – Ambo100 Oct 3 '12 at 17:05

Yes there is a way to get it repaired easily. This also happened to my NXT too so what I would do is go on to this page on the Mindstorms website

And then go to NXT then go download the NXT software to the NXT.

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I believe you misunderstood the question. The question relates to a hardware problem in which the display malfunctions in an otherwise fully working NXT. You answer is for if the NXT is in SAMBA mode and needs firmware downloaded, which is answered in another question. – HaydenStudios Sep 12 '14 at 22:07

This one nailed it: Well, actually the link to this video did:

My NXT was left on the shelf for about 3 years and after much trouble to get it alive again, the screen would just display randomly flickering lines.

Well, I did exactly as in the video: opened up the unit, reheated the soldering joints of the 3 caps, and whalla, its working perfectly again!

Its actually so simple why: Over time the soldering joints loose their conductivity but reheating it revitalises the bonds. Its the same reason why baking a computer screen card in the oven works to kick some live back into old notebooks.

Thanks community

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This doesn't sound like an answer. These remarks would be better as a comment on the answer that you found helpful. – David Lechner Dec 15 '15 at 22:56

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