Monitor disassembly

I have an old monitor that doesn't work right that I would like to dismantle to use it to house a fish tank (I am going to custom make the tank).  I'm just a little leary about tearing it apart due to the fact that there is a LOT of voltage stored up in the monitor usually.  Is it something that I can just easily do, or is there some trick to getting the whole tube thing out?
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TASINetworkAsked:
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jhanceCommented:
I would STRONGLY advise you against doing this.  Not only is there the real possibility of a dangerous, even lethal electric shock (even if it's been powered off for months!) there is also the possibility of breaking the CRT itself and causing an implosion.  That too can be very dangerous when it sends glass fragements flying in all directions.

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dbruntonCommented:
Note jhance's warning. Carefully.

However I do suggest you read this

http://www.repairfaq.org/REPAIR/F_safety.html

It can be done though.  Removing the case isn't too bad, you have to find the screws and then split the case; splitting can be awkward as the method of how the two halves clip together isn't always obvious.

Once apart is when it gets dangerous.  Usually on more modern ones its a matter of unplugging everything and removing the power board.

Note that there may be a small amount of radioactive gas inside the monitor tube; I can be corrected on this statement, my memory ain't what it used to be..  The tube is generally fairly strong unless you bump the end where all the electronics plug into.  
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Irwin SantosComputer Integration SpecialistCommented:
I've done this years ago...

However as jhance mentioned... "lethal" is very real.

so here is my disclaimer...

I am going to suggest a few things...and it's up to you whether you want to do it or not.

- wear rubber shoes
- discharge any static electricity from your body
- put your monitor on wood
- make sure your floor is non-conductive
- remove power cord
- open monitor
- look for large capacitors, and take a bladed screwdriver and tap the contact leads (make sure you have a rubber handle), it will spark (you may want to use protective rubber gloves).. keep tapping it till no sparks...go through all the capicitors, the either look like discs or large cylindrical
- next move start removing the tube and video driver board... use rubber gloves.. unscrew anything mounted... pull the guts out and throw away/dispose...

next step..

insert fish

:-)
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scrathcyboyCommented:
All this "lethal" stuff -- all you need do is let monitor sit for a week, no power attached, all voltage totally gone, then you do what you want with it.  I wonk on hundreds of monitors, never get 1 volt out of them.
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jhanceCommented:
*** DANGER*** DANGER *** DANGER ***

>>I wonk on hundreds of monitors, never get 1 volt out of them.

Regardless, however, it takes only ONE exception to this theory to end up in DEAD.  Many displays are designed to self-discharge but not all are or the discharge circuitry could be defective or broken.  How do you know there is only "1 volt" in them?  If you've measured the anode voltage with a DMM or VOM you probably damaged the meter unless you used a special HV probe.  Or the act of measuring the voltage with a 1M input impedance meter dischaged the voltage to a safe level.

That coupled with your other question on EE:

http://www.experts-exchange.com/Hardware/Q_21807029.html

Leads me to believe that you're not the expert on monitor repair you boast about here:

>>I wonk on hundreds of monitors...

You are free to risk your own life but please don't make light of what is really a very dangerous thing to do:

1) Ignore the possibility of very high residual voltage on the CRT anode.
2) Ignore the possibility of implosion from damaging the CRT glass envelope.

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TASINetwork - I urge you to ignore this dangerous advice.  If you really want to take the CRT out of the display enclosure get a qualified technician to do it for you.  If you do decide to proceed on your own, please exercise extreme caution.  

Rubber gloves and shoes will not help here.  The anode voltage on a color CRT can be 25KV or higher.  This is enough to go right through rubber gloves and can KILL YOU!

Be sure you wear fully enclosed eye protectors in the case of flying glass.

Please also DO NOT dispose of the removed CRT carelessly.  If you just put it in the trash, you're putting your trash collector at risk also.  Take it to a TV repair shop and get the technician to de-activate the vacuum for you.
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TASINetworkAuthor Commented:
I am not about to try and discharge a high voltage capaciter by touching it, even with gloves and standing on rubber...  that just sounds way to dangerous to me!
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Irwin SantosComputer Integration SpecialistCommented:
"I am not about to try and discharge a high voltage capaciter by touching it, even with gloves and standing on rubber...  that just sounds way to dangerous to me!"

The satisfaction that you get when you actually make this work...is true elation"....I had this 15" monitor with a few angel fish and terra's, it was the talk when anyone came into my office.  Of course it is high risk and as jhance commented about taking it to a repair technician, that would probably be prudent.  Pay them a few $$ for it, will save you the anxiety of tapping that cap, which I have no problem doing so, as I am the Hawaiian Superman ;-)
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Irwin SantosComputer Integration SpecialistCommented:
@daleoran...if you exclude all the safety suggestions..the solution is there in dbrunton's first comment, jhance 2nd comment and my first comment.

though scratchyboy offered his insight...I would have to disagree with his comment as letting the monitor sit for a week to discharge the capacitors is NOT true. Capacitors will discharge if you apply a component to it or via leakage/dissapation...and the latter doesn't happen in 1 week.  In addition, the number of volts won't kill you, it's in the amperage that pumps the voltage.

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Irwin SantosComputer Integration SpecialistCommented:
Woohoo!!..  just marking this question as my Hardware Guru Certification
:-)
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