How to Safely Disassemble a CRT Monitor

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Introduction: How to Safely Disassemble a CRT Monitor

About: I am a high school student in Cairns, Queensland. Most of the time I am either at school, sleeping, doing stuff on my computer, making circuits of some kind or messing with 240v

Do you have a old CRT monitor lying around your house but you think it's too dangerous.
Now is your chance to do it moderately safely do it.


I take no responsibility for any injuries ect. caused by you disassembling a CRT monitor.

Step 1: Tools

  • Screwdriver (Insulated handle)(one that you don't mind the tip getting a bit melted)
  • Piece of wire, one that you don't mind melting, preferably a thick wire (to ground the screwdriver)
  • Nail (to puncture the tube to fill the vacuum)
  • Rubber shoes (To insulate you from the ground)(optional)

Step 2: Removing the Screws From the Monitor

Well do what the title says,
Remove the screws and you can remove the base if you want to.
When all the screws are removed carefully take the cover off.

Step 3: Discharge the CRT

Connect the wire that was in the tools list to a ground wire,how to find a earth/ground, on that PCB find the earth terminal of the power input and connect the wire to that. Connect the other end to the insulated screwdriver. Make sure that electricity can flow from the end of the screwdriver to the ground wire.

Put the end of the screwdriver under the suction cap and tap it onto the wire. If it is charged you will hear a loud crack, do that a couple of time just to be sure it doesn't crack it's uncharged but try to discharge it a couple of times anyway.

Step 4: Remove the PCB on the Neck of the Monitor

Remove the PCB on the neck of the monitor, there will be zip-ties holding it down or glue. Cut the zip-ties or break through the glue.

You will have to be careful with both methods.

Step 5: Releasing the Vacuum of the CRT

Get the nail or small object to break the point where they originally removed the air (vacuumed) from the CRT.

If you want to be extra careful, but a blanket over the monitor and break the fill point.

Tap the nail in with whatever you want, when you hear it start hissing that means you broke the vacuum, once the hissing has stopped you can do whatever you want with the parts.

That concludes my Instructable
Please comment and rate it if you like it.

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    57 Comments

    I recently found a CRT monitor in my neighborhood and I'm planning to incorporate it into an art piece that I'm working on. Thanks so much for the helpful instructions!

    Very clear exposition of a daunting job. Kudos!!

    So I just straight up cut through all the wires and the big red one leading to the suction cup and no sparks or melting wire cutters ... could something still be charged ? Other than any capacitors ? I haven't removed the suction cup yet ...

    IMG_0952[1].jpg

    errr why would you need to do this?

    I disassembles one of these today, i wish i would have seen how to ground it before i shocked myself! dang flyback...

    when my tv breaks im goona take it apart cuz i want a flyback but i thin that the tv will have gone bust beacause of the flyback great instructable by the way

    Nice intructable, someday I'll do a follow up on using the parts if there isn't one already.

    There is one piece I really like for non-electrical reasons. You can see (step 5) a metal ring going around the tube, just below the green topper, with a bolt through it (the bolt is at a tangent to the green circle, on the bottom left). This thing can be really useful. I keep one on my belt loop to hold a standard plastic bottle at my waist. It just pops in and out, no adjustment necessary, once you get it right.

    Be well.
    -Ref

    As you already got a answer, I don't need to answer, but I want to. You can leave it intact, but filling it (getting rid of the vacume (I still can't spell that), reduces the risl of implosion etc.

    Ooh, I found the answer below!

    Would it be possible to somehow extract the CRT without damaging in and to use it again for another proejct?

    5 replies

    Yes, but i broke the vacuum so it didn't implode if i dropped it.......

    But if someone didn't brake the vacuum, what could be done with just the CRT? I would also be interested to know.

    There is very little you can do with the CRT once you get rid of the driver circuitry. Making your own drivers are not a good idea, Unless you want to potentially give yourself a mega dose of all types of radiation.

    might you be planning on making a CRT fishtank? WOW! I am too!

    No, unless you call the poisionous lead and phosphors radiation...

    if you break the vacume dont you have to worry about explosive decompression????

    1 reply

    Yep, Breaking the neck of the CRT or piercing a hole in the place where it was originally filled (at the top of the neck) slows the decompression because there must be a restriction in the neck somewhere... But it's always good to be careful.