Questions tagged [repair]
Bricks and Elements sometimes break - perhaps we can help you fix them?
66
questions
11
votes
1answer
116 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 ...
4
votes
1answer
123 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
73 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
843 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
182 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
98 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
66 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
151 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
111 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
98 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
424 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
201 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
79 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
58 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. ...
12
votes
3answers
4k 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
115 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
1k 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
38 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
507 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
975 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 ...
3
votes
2answers
2k 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
200 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
310 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
4k 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
216 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
476 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
527 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
140 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
5k 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
885 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
631 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
829 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
360 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
123 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
304 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?
9
votes
4answers
1k 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
465 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?...
13
votes
1answer
684 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
530 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
9k 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? ...
7
votes
2answers
2k views
Fixing poorly applied stickers
Does anyone have any tricks to removing a sticker and reapplying, after a significant period of time? I recently purchased a lot of sets from 2000-2010 range, and the stickers look like they were ...
6
votes
6answers
7k views
How do I repair loose arm joints?
The arms on my LEGO minifigures are loose. How can I repair these to remain in place when I move the arm to the location I want it to stay in?
5
votes
3answers
1k views
Is it possible to shrink down a wheel?
I have a tire 6581 which is stretched to the point it doesn't fit perfectly with the balloon designated for it, at one place it is kinda popped out. It is caused by my stretching it when I was younger ...
