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The material deformation you are seeing is called ‘plasticity’. It happens when a material under stress is deformed and doesn’t return to its original shape (this would be called elasticity). In many cases (and it is the case with LEGO ABS plastic), this deformation weakens the material (as mentioned by Kramii). To fix this part you have to deform it ...

There's a YouTube video which explains how you can replace the battery in that light brick. You can also find the owner's explanation on the Eurobricks forums. Quoting from that site: What you'll need: ExoForce Light brick (obviously) A small screwdriver (or other item with a long, thin shaft) (my s'driver was 2mm (0.07 inches) thick) A ...

One of these? I regularly crushed these as a child. You could try inserting something small into the hole and gently easing it open. I've had modest success with a small screwdriver. Unfortunately, the gear will be weakened following a flattening. If it is badly squashed it is very likely break - either as you try to repair it or in use. Your best bet, ...

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 ...

If you are using NXT-G, the software that comes with the NXT set, then here is what you do: Get into NXT-G, start a new program. Select the tools option, and from the drop-down menu, select "Update NXT Firmware..." Plug your USB cable (one comes with the set) into your NXT. Don't try using bluetooth, as it won't work. Click the download button on the ...

one thing that worked for me is to use a very small needle-nose plier or a tweezer to hold the torso from inside while pushing the crack apart (very carefully). now you can use a toothpick or a needle get a bit of superglue in the crack to fix it. note that this just works for bigger cracks like the ones going up to the armpits.

Taken from the additional notes of this bricks Bricklink catalogue entry. This item takes one CR927 3V Lithium battery. A very tiny flat screwdriver is needed to push the little clips to open up the assembly. I occasionally use the minifig-scale Axe, Crowbar or Screwdriver to pry plates, tiles and other bricks. If you don't have a ...

I'd suggest storing them straightened up for a while, if possible in 32 adjoining 1x2 bricks with cross hole, and add a few layers of bricks to hold them in place. At least it's a pure LEGO solution, but I'm not sure how efficient.

The easiest solution, provided that motor is still in production, is to contact the LEGO customer service (this online form is usually the easiest way, but you can also call them), they'll usually provide a replacement without problem.

Maybe the plastic is worn off just enough that the switch is not pushing the pins completely anymore. Debug step 1: When the train pins are in the switch zone there shouldn't be a lot of space between the point of the pins and the face of the switch. If it looks too loose that could be the problem. A way to test this would be to put some clear scotch ...

I have had some success straightening bent train level crossing gate barriers by first immersing the pieces in a bowl of hot water*, for around 5 minutes to soften the plastic and then immediately trapping them between two hardback books and applying weights until they have cooled. So by using Joubarc's method to hold the axles straight combined with a ...

There is at least one possible way to hide the damage to a cracked torso and brace it at the same time. Wrapping the outside of a cracked minifig torso with a decal and/or a piece of transparent tape can increase the snugness of the pelvis/torso fit as well as reduce the rate of future cracking. There is a downside. If you do this without taking due care, ...

The parts become leaky due to the seals inside the pistons deteriorating. Typically, the seal is made with an "o-ring" - a circular rubber band (cross section as well as the shape) - if this is the case in the LEGO pistons, and then it's possible the o-rings are made with similar rubber to the LEGO rubber bands, and then they will deteriorate over time in ...

I don't think it's really possible to salvage it, as others said, you'll only weaken it more. Even if you can place it on an axle, there's a good chance it will break under stress. But replacement should be very easy to find, and don't forget you could also contact the LEGO customer service for that. It sounds a bit overkill, but they will usually happily ...

Here's what I did: First I tried a screwdriver and awl, but couldn't get it to work. What did work was pinching it with pliers to open the hole, and then sliding in a rod. The piece is intact, but very flexible now. It is very deformed, but becomes uniform when attached to an axle. I'm going to leave it attached for a while to see if it evens it out more. ...