Questions tagged [repair]
Bricks, pieces and other elements sometimes break, deform, stop working, or get otherwise damaged - perhaps we can help you fix them?
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How do you repair yellowed or faded LEGO blocks?
In particular, I've had white blocks that have yellowed in places. Can the colour consistency be restored? Or at least improved?
I'd be more interested in people's actual experiences rather than ...
- 2,149
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votes
5
answers
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Repairing Lego minifigure torso cracks/damage
I have a ton of Lego minifigures that I really put through their paces throughout my childhood (fighting pirates, exploring space... basic stuff really). A number of them are damaged on the torso. ...
- 1,119
21
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1
answer
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NXT screen either flickering or blank, what do I do?
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 ...
- 2,840
19
votes
2
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Is it possible to change the battery in a 54604 light brick?
I got 4 of these in in a bulk lot of Lego, but the lamp is getting quite dim in a couple of them.
Is it possible to change the battery in a 54604 light brick?
It looks like the brick should open, ...
- 9,121
16
votes
3
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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 ...
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4
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How can I fix a flattened gear?
I have an old small gear that somehow got flattened to an oval shape. The axle hole is too narrow to slide a bar through, although it is not completely closed shut.
How can I repair this gear?
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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? ...
- 2,105
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Will Lego repair a bad motor?
I have the Electric Technic Micromotor:
http://www.peeron.com/inv/sets/5119-1
and it simply won't come on. I seem to recall at some point someone telling me a long time ago, that if you sent parts ...
- 193
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1
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How to repair leaky pneumatics?
Some of my pneumatics parts, mostly pistons, have seals which no longer prevent the air from escaping completely. On some parts they are unreliable and on others they are not working at all.
Why do ...
- 1,993
14
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6
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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 ...
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What can I do to repair my minifigures loose neck/head joint?
I have a number of loose neck joints on my minifigures. How can I repair them? Any suggestions?
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2
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Is there a way to re-tighten a minifigure's hip joint?
When a minifigure is new, the joints where its legs joins its hips is relatively stiff. However, when a minifig gets old and has been used a lot, this joint can get very loose leaving its legs very ...
- 9,121
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2
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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/...
- 243
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1
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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 ...
- 1,156
12
votes
1
answer
797
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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 ...
- 1,156
12
votes
1
answer
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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 ...
- 13.3k
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8
answers
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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?
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11
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1
answer
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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 ...
- 211
10
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3
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2k
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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 ...
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4
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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 ...
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2
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2k
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How to fix my XL motor?
I used the XL motor near water. Now it stopped working. Can someone tell me what I can do to fix it?
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1
answer
2k
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NXT motors not moving?
I've been looking around the net for a solution to this problem, to no avail.
After taking my NXT v1 out of storage, I tried using a motor, but it sortof just, moves back and forth once, then '...
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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?...
- 6,151
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4
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How to straighten 32L axles?
I have a number of the 32L technic axles, but most of them have some bend to them. Is there a straight-forward way to straighten these? Trying to bend them by hand has not seemed to change anything, ...
- 1,569
8
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3
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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 ...
- 83
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votes
1
answer
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How to restore minifig faces?
Vintage minifig heads (from the 80s, 90s with the classic smiley) often lose their eyes and mouths after years of play. The paint wears off.
How do you best restore the heads?
- 1,678
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1
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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 ...
- 1,285
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2
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1k
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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?
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3
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How to open first version of the pneumatic cylinder? (Part no 4688c01)
I have a Lego Technic set 8040 from 1984 with the first version of the pneumatic cylinder. Unfortunately, the shaft on the cylinder broke.
Apparently the top of the cylinder (lid) is glued. Is there a ...
- 221
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3
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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 ...
- 629
7
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2
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9k
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How can I get my NXT to turn on - all it does is softly click?
Recently when I plugged my NXT brick into my PC I clicked on the wrong option and now all it does is clicks when I turn it on? How do I get it back to a usable state?
- 19.5k
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2
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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 ...
- 101
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votes
1
answer
530
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Fix Power Functions cable near connector (L motor)
We have a broken cable on the power functions L motor. I've fixed an M-motor before in the engine, but this time the cut is near the connector.
Unlike the M-motor, this connector doesn't have the ...
- 243
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2
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15k
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How to repair cracked/peeling decals?
Does anyone have any ideas on how to repair and protect cracked/peeling decals, like these pictured in my 10019 set:
Some kind of film or lacquer?
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1
answer
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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 ...
- 173
7
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0
answers
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Oil for old 4.5V motor? (UK)
I've just got my old LEGO Technic motor from my loft. It works but squeals in a way I don't remember it doing (35 years ago). I assume some lubrication would help and I've seen references to 3-IN-ONE ...
- 171
6
votes
1
answer
115
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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 ...
- 637
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votes
2
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4k
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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 ...
- 183
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votes
1
answer
1k
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Fix for monorail sticking at monoswitch?
I recently acquired an old monorail set, and I'm having problems getting it to work properly. It works fine on normal track, and it is able to continue on or stop at a monoswitch when the switch is ...
- 39.8k
6
votes
1
answer
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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 ...
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votes
2
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800
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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 ...
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1
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How can I prevent rubber bands disintegrating?
These two answers partially answer this question., but I think it's worth its own question to find more options in a more comprehensive answer.
Old Lego rubber bands are known to become brittle over ...
- 2,659
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votes
0
answers
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Fix Lego M Motor - The hooks aren't budging
I have a Lego M motor that is broken. I'm following the instructions here to try to fix it but the little tabs that hold the plastic frame together just won't budge no matter how hard I'm pushing them ...
- 1,119
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votes
2
answers
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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 ...
- 965
5
votes
1
answer
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EV3 Home Shuts down after 2 min. (lights orange, and 3 Icons Triangle, Gage, Manual)
I just purchased a second hand LEGO Mindstorms Home EV3.
The brick turns on, allows firmware update, etc. However, after about 2 minutes the unit makes a noise, LED's turn red, and 3 icons appear.
...
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5
votes
1
answer
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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 ...
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5
votes
1
answer
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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 ...
5
votes
0
answers
145
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IR remote 8879 - cannot control speed of the motor
I got the 7938 train set for my kid.
I hook up the battery to the receiver and try the IR remote 8879 with it.
The motor starts running/spinning, but I can not control the speed with the orange "...
- 51
5
votes
0
answers
193
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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 ...
5
votes
0
answers
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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?
- 51