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Questions tagged [repair]

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Bricks and Elements sometimes break - perhaps we can help you fix them?

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5
votes
0answers
165 views

what plastic is used in the floatable hull of 60266 Ocean Exploration ship?

I need to know what plastic is used for the hull (dark blue) of the 60266: Ocean Exploration Ship, in order to glue a reinforcement on. I bought this for my boys (younger than the advertised 7+). It ...
7
votes
1answer
154 views

Reinforcing a pair of Bent Double 11.5 Liftarms under Rotational Tension

I purchased a clone MOC out of interest a few months back, this following set. Because it does use clone pieces, I knew there was a high chance of breakage and poor fit, especially in the tensegrity ...
11
votes
1answer
141 views

12V LEGO train tracks splinter

I have an older 12V LEGO train (several actually) but of course the rubber tires wore out long ago. The trains still run quite well (I even used them as a motor parts in some Technic designs), but the ...
5
votes
1answer
140 views

Broken pneumatic distribution block

I have a first-generation Lego Pneumatic set (nr 8851) that I recently took out of storage. I remembered from the last time I built the set that the pneumatics weren't working and I just confirmed ...
3
votes
1answer
82 views

What is the maximum voltage for motors from Cybermaster units?

I recently bought a non-functioning Cybermaster unit [part:71797]. As the motors in there might be perfectly fine, I'd like to use them. I could not find information on these motors (as opposed to ...
9
votes
3answers
1k views

Old RCX Wires Have Become Grey and Brittle

I have a LEGO MINDSTORMS Robotics Invention System 2.0 (3804) that I acquired back in 2003 (17 years ago), and the wires have become grey and brittle. The wires used to be black and smooth, and ...
3
votes
1answer
189 views

Miniature Lepin box door stuck inside box itself

Yes, maybe the title may be confusing, but this image says it all: I got a Lepin city set not too long ago, and it included this box. I have no idea how this happened but during use the door ...
4
votes
0answers
132 views

Repairing a 12V switch motor

My son caused me to dig up my old 12V lego trains. Surprisingly they mostly work, except for one part: https://www.bricklink.com/v2/catalog/catalogitem.page?P=70026&idColor=9#T=C&C=9 This is ...
5
votes
0answers
83 views

How do I fix a loose joint between the top and bottom of the digger base?

How do I repair a loose-fitting joint between the top and bottom of the Duplo digger base? It has been used for only about a year. Is the wear more likely on the top or the bottom piece?
1
vote
3answers
206 views

Lego Mindstorms NXT 2.0 brick is not working

Recently, I tried to get my old NXT 2.0 brick fixed. Everything seemed to point to the clicking brick problem, but it turns out not to be the only thing, the brick was also getting hot. After ...
2
votes
0answers
119 views

How to repair warped plates [closed]

I have some large plates and a boat hull that have warped due to temperature, and I would like to fix them. Is there any way to do so? And if not, is there any way to replace them? I tried contacting ...
6
votes
1answer
101 views

Non-standard diameter pole - reinforcing a repair

I have (or rather my daughter has) a Fabuland umbrella which has been snapped off where it meets the base (probably over 30 years ago when her mum was a child). I've seen Can I repair a broken LEGO ...
5
votes
2answers
463 views

How to locate pneumatic leak

I have a simple pneumatic claw with a 2 pump compressor that I built somewhat recently. It worked fine for a while, producing up to 4 bars of pressure, but then the system wouldn't increase the ...
4
votes
0answers
298 views

Lego Mindstorms NXT 2.0 Not turning on

I have a Lego Mindstorms NXT 2.0, which worked well for a couple of years. However, after the last few weeks, it seems to not boot up. I took it apart, and noticed it seems to have a different ...
2
votes
1answer
83 views

How to fix cracked minifig arms?

I have a few minifigs with their arms cracked lengthwise, which is a big problem as the hands constantly fall off at the slightest touch (or even fall off of their own accord). Is there any way to fix ...
3
votes
1answer
63 views

Power Function IR Remote always emitting after putting batteries

My PF IR remote led indication light is constantly on after I put in new batteries. It stay on without me touching anything. A quick check with my phone camera showed that the IR emitter is emitting. ...
13
votes
3answers
5k views

How to disassemble LEGO train engine base part# 28743?

I have one of the new Bluetooth engines (part 28743, but in the bottom it says Hub No 5 model) that has started to under-perform and make some noises, I think that it need some maintenance (maybe due ...
1
vote
1answer
120 views

My DUPLO railroad engine stops after 20cm

My DUPLO railroad engine stops after 20cm moving. I suppose the sensor in the front axle is damaged. So is it possible to repair it?
4
votes
4answers
2k views

My LEGO character's helmet keeps falling off... Is there any way to fix?

My figure won't keep its helmet on and if I get it on it is very loose and will spin around.
1
vote
0answers
39 views

How can I get this broken part out? [duplicate]

My New LEGO minifig has a broken hand because of me. How can I get this broken part out?
2
votes
2answers
637 views

Problem With Bionicle Joint Sockets Cracking, Repair Options?

I'm pretty sure that serious Bionicle fans have all dealt with cracking of the joint socket pieces. However, is super-gluing the broken parts a solution? I'm worried that the joint socket won't be ...
12
votes
1answer
1k views

Replace Battery in LEGO Dino Attack Light-Up T-Rex Head?

Is it possible to replace the battery of the LEGO Dino Attack T-Rex head? There's a button on the top of the head that makes the eyes and tongue light up red, presumably via a red LED. There doesn't ...
14
votes
2answers
608 views

Is it possible to dismantle and refurbish an original 870 Technic motor?

I have a couple of ancient 870 motors (the 4.5v ones) that run but don't sound great. I've looked for, but can't find, a guide on how to dismantle them. I'd like to either get in there and clean/...
4
votes
2answers
3k views

Repairing disintegrated old 9V wire

I have a number of old technic motors and battery boxes I would like to use however the wires have disintegrated in storage to the point that the metal conductors touch and short out. Does anybody ...
5
votes
1answer
211 views

Why are my pieces breaking? "3612 Arm piece straight with 2 and 3 fingers"

I've dug up my old LEGO (from 1990's) and most bricks are simply scratched and dirty. However, the arm pieces 3612 break on touch! Are they simply a bad, too thin, design, or is there something more ...
3
votes
2answers
408 views

EV3 brick not turning on, nothing on display?

Ev3 brick not turning on, nothing on display, just red leds are on, tried 3 buttons not working.
9
votes
5answers
5k views

Minifigure Hand broken and stuck in arm

A friend of mine gave me some of his old minifigures. As you guys can see, the hand of one of the figures is broken and a part of the hand is stuck in the arm. Do you have any ideas how to remove the ...
3
votes
1answer
234 views

How to safely straighten 2569 Lego Antenna Whip 8H?

I have one of those, in trans-neon green, that's slightly bent. I don't want to break it or make it opaque. Is there a way to make it straight again without risk? Preferably universal way, but way ...
8
votes
1answer
575 views

Why do LEGO parts break?

I disassembled the Airplane set 7893 with normal pressure on the bricks and it happened that some parts broke like dry brittle leaves, see picture. The storage conditions have been in the open and ...
8
votes
2answers
1k views

How can I repair a red 12v train motor from Set# 7730?

I have a LEGO 7865 Red 12 volt train motor from a LEGO 7730 train set. The motor has stopped working as it has been dropped on one of the wheels. How can I open the motor case to effect a repair?
6
votes
2answers
595 views

How to fix the 4.3V output supply of a NXT 2.0?

I have a Mindstorm NXT 2.0 from 2007 (PCB code: 62115.40H) at which the sensors except the simple "Touch sensor" are no longer working. Also the tacho-signal of the motors do no longer work. (The ...
6
votes
1answer
145 views

Lubricating 4.5V 6216m2 engine

Is there any way to lubricate old 4.5V 6216m2 engines (these grey round ones)? I have 2 from my childhood, and they still run, but have trouble starting and make an awful 'whining' sound from time to ...
4
votes
1answer
2k views

Is it possible to fix a broken EV3 Port?

I have an EV3 running RobotC version 4.55. The medium motor connected to Port A does not run, but if I connect it to another port (B,C,or D) it works. I tested it manually through the EV3 motor tab ...
4
votes
1answer
6k views

How to open Duplo train base 2961b?

How can I open a Duplo train base 2961b without destroying it? It is not working despite fresh batteries. There are no screws.
3
votes
1answer
1k views

Is it possible to repair LEGO box creases?

Has anyone tried ironing or flattening a creased lego box to diminish the appearance of the damage?
2
votes
1answer
837 views

Unable to turn on NXT. Completely Frozen [closed]

I recently downloaded a file on my NXT and when I used it, it didn't work as intended. The motors started to make sounds like they were jammed, one got stuck and now the NXT won't even turn on. I ...
3
votes
1answer
883 views

Lego 12v motor axle repair

I had recently got my Lego 7730 for past Christmas and wanted to use it. I bought the Lego 7864 and went to test the red motor but all I heard was the motor and it didn't move. I decided to take a ...
2
votes
1answer
372 views

Dan I open/repair this Duplo pullback motor?

My son has a Duplo pullback motor. This motor does not work well. After pull back it moves forwards 2 and a half wheel turns and stops. There is a small resistance forcing it forward two millimeters ...
1
vote
0answers
127 views

Does LEGO still exchange the Mindstorms NXT bricks with flicker problems? [duplicate]

I'm new here. Does LEGO still exchange the Mindstorms NXT bricks with flicker problems? If not, does anyone know of someone willing to try and fix them for a fee or barter?
7
votes
3answers
8k views

EV3 screen stuck at "Starting..."

After I turn the device on, its screen is stuck at "starting..." for a long time. It hasn't change into the regular screen, and the light behind the button was still red (didn't become green). Is ...
3
votes
1answer
365 views

NXT Display is messed up

I have an NXT 1.0 and the LCD display only displays noise. Anyone know how to get one replaced or repaired?
10
votes
4answers
2k views

How to help a yellowed brick with a sticker?

My parents recently finally decided they can return me my childhood toys with 1990s Technic sets including the 8880 Super Car. All other sets were in boxes, but this one spent the last 15+ years ...
3
votes
3answers
2k views

How can I fix my chewed up LEGO head?

When I was about 8 I used to bite down on loose LEGO heads to "fix" them. Of course after the heads "treatment" they would have chew marks around the neck. Is there any way to make these marks less ...
11
votes
1answer
1k views

Can I safely dissassemble a 74569 motor (the old, fast 9v one)

I have an ancient 74569 motor: Unfortunately, it's broken: The shaft spins freely by hand, but when I connect power to it, it doesn't spin at all. I would like to see if I can just open it and place ...
4
votes
2answers
1k views

Cracked LEGO torso [duplicate]

I recently discovered that my LEGO Legolas minifig from LEGO Lord of the Rings has two small cracks starting from the base of the torso on each side, but I wonder: will these cracks extend and damage ...
4
votes
2answers
491 views

Faulty NXT Motor

I have a motor that prevents the program from running. It simply allows a few slow movements forward with stops in between. It seems very stiff to rotate manually. Any way I can repair this motor?
9
votes
1answer
1k views

How to restore old, scratched plates

I have some old lego plates that are quite scratched. They look rather dull compared to the newer pieces in my collection. Is there any way to restore (even partially) the shiny look between the studs?...
12
votes
1answer
737 views

What element is this a piece of, and how can I repair it?

Yesterday, as I was putting away some Lego, I saw the following obviously broken piece. I couldn't figure out what element this was a piece of, so I was all ready to ask it here, when I came across ...
1
vote
1answer
567 views

Minifigure Torso Cracks

So I recently picked up the new Star Wars AT-AP and I was quite please with what I got, but after not even a week The awesome Commander Gree Figure had a torso crack that went from the bottom of the ...
15
votes
4answers
10k views

Can I repair a broken LEGO brick with glue?

I have a dump truck hinge piece that snapped in half when it got bent backwards too hard. Is there a type of glue that would be appropriate to repair the piece? Would superglue be a good choice? ...

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