Monitor question

myungk99 · 07-09-2001, 05:53 PM

I heard that even after they are unplugged monitors can hold a pretty nasty electrical charge, so it's inadvisable to futz with their innards. I want to do a bit of dustbusting on the inside of my monitor (it's a big 22" CRT), but I'm afraid of getting zapped out of my socks. Does anyone know about how long it takes for the electrical charge to dissapate from a monitor after it has been unplugged? Thanks.

-Myung

hapoo · 07-09-2001, 05:59 PM

if your really concerned i'd suggest taking the monitor outside and using a can of compressed air to blow all the dust out.

flyawaydog · 07-09-2001, 06:13 PM

If it works like stereo systems you could discharge it buy turning it on while it unplugged. I dunno though I am no engineer. Try just not touching any thing metalic maybe?

Air compressor use could be nasty if the source is not filtered for water and oil. Careful there, ZZZOT!!!! PHissst.... Thinking of charged capacitors and oily water!!

coleslaw · 07-09-2001, 06:48 PM

I've heard that a charge of up to 10,000 volts can be stored on the backside of your monitor's screen. Like any capacitor, just give the charge some time to decay on its own. I would recommend turning your monitor off and then allowing it to sit idle overnight. I too would recommend against the method of using compressed air if you feel that there is still a charge present. Dust and any other particles suspended in air can be extremely explosive. If that high voltage were to discharge with a cloud of dust surrounding the monitor, your monitor could very possibly explode. I'm not talking about the tube of your monitor, as that is within a vacuum, but I am talking about the tube discharging to an exterior location, where a cloud of dust might be present. I remember charging a large capacitor to only 100V in a lab once and shorting the posts with a wire. There was a very loud pop and the wire physically snapped in half because it was melted. It was pretty cool!

sbp · 07-10-2001, 07:55 AM

I would strongly urge you to avoid dealing with the inside of a monitor myungk99. Take it to authorized service person if need be.

attgig · 07-10-2001, 08:18 AM

and like all crt's, monitors hold high charge after being unplugged. The best would be to give it to someone who knows what they're doing, but if you're feeling adventurous...how bout dialing 9-1, and leave your finger on the last one before blowing any air out =P

07-09-2001, 05:59 PM	#2
hapoo Fleet Admiral Join Date: Jan 2000 Location: 742 Evergreen Terrace, Springfield USA Posts: 9,276	if your really concerned i'd suggest taking the monitor outside and using a can of compressed air to blow all the dust out. __________________

07-09-2001, 06:48 PM	#4
coleslaw Arrrhh! Join Date: May 2000 Location: LI NY Posts: 6,807	I've heard that a charge of up to 10,000 volts can be stored on the backside of your monitor's screen. Like any capacitor, just give the charge some time to decay on its own. I would recommend turning your monitor off and then allowing it to sit idle overnight. I too would recommend against the method of using compressed air if you feel that there is still a charge present. Dust and any other particles suspended in air can be extremely explosive. If that high voltage were to discharge with a cloud of dust surrounding the monitor, your monitor could very possibly explode. I'm not talking about the tube of your monitor, as that is within a vacuum, but I am talking about the tube discharging to an exterior location, where a cloud of dust might be present. I remember charging a large capacitor to only 100V in a lab once and shorting the posts with a wire. There was a very loud pop and the wire physically snapped in half because it was melted. It was pretty cool! __________________ A priest, a paladin and Varimathras walk into a bar...

07-10-2001, 08:18 AM	#6
attgig Chief of Naval Operations Join Date: Jun 2000 Location: the burbs of baltimore Posts: 11,924	my dad used to fix tv's and such... and like all crt's, monitors hold high charge after being unplugged. The best would be to give it to someone who knows what they're doing, but if you're feeling adventurous...how bout dialing 9-1, and leave your finger on the last one before blowing any air out =P

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07-09-2001, 05:53 PM	#1
myungk99 Plebe Join Date: Jul 2001 Posts: 3	I heard that even after they are unplugged monitors can hold a pretty nasty electrical charge, so it's inadvisable to futz with their innards. I want to do a bit of dustbusting on the inside of my monitor (it's a big 22" CRT), but I'm afraid of getting zapped out of my socks. Does anyone know about how long it takes for the electrical charge to dissapate from a monitor after it has been unplugged? Thanks. -Myung

07-09-2001, 06:13 PM	#3
flyawaydog Ensign Join Date: Jun 2000 Posts: 19	If it works like stereo systems you could discharge it buy turning it on while it unplugged. I dunno though I am no engineer. Try just not touching any thing metalic maybe? Air compressor use could be nasty if the source is not filtered for water and oil. Careful there, ZZZOT!!!! PHissst.... Thinking of charged capacitors and oily water!!

07-10-2001, 07:55 AM	#5
sbp Chief of Naval Operations Join Date: Dec 1999 Posts: 11,037	I would strongly urge you to avoid dealing with the inside of a monitor myungk99. Take it to authorized service person if need be.

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