<font color="00cc99">Well I've noticed recently that my monitor has been making a really loud high-pitched noise. The noise is hard to explain but it sounds a little like that noise you sometimes get in your ears after someone yells in them.
Anyway, I am starting to worry. I've tested all of the connections and they're all fine. What could it be? Is my monitor going to blow up?

Also I have noticed that the noise is a lot louder when there is a lot of 'white' on the screen at once.</font>

<font color="#cc9999"> The high pitched whine sometimes heard from CRT type displays (TV's or computer monitors) is usually caused by the flyback transformer. This component is made of metal sheets laminated together with copper wires coiled around parts of it. The lamanint (sticky stuff that holds it all together) some times dries out and some of the metal plates are thus loosened just a tiny bit, allowing magnetic fields to cause them to vibrate causing the high pitched squeel.

I got this explanation a million years ago when I was doing electrical engineering studies in the Navy [img]smile.gif[/img]

Umm forgot to mention, this is usually a harmless effect, except for the insanity it drives some people to [img]smile.gif[/img] And should not affect the performance of the monitor unless it gets seriously bad, to the point where the transformer falls apart.

Also forgot to mention, the flyback transformer provides the really high voltage deflection current....I think...geez now I've forgotten... *sigh* </font>

[ 09-12-2002, 12:40 PM: Message edited by: MagiK ]

<font color=FFFFFF>Darn mutch problems you have with that monitor Deathbringer if i was you i would send it to repair because it maby can be dangerus to sitt in front of it if it explode, i dont try to scare you and i have never heard about a monitor that have exploded only tv`s but be careful! [img]tongue.gif[/img] </font>

<font color="#cc9999"> Not much chance of an explosion. Usually TV's that explode are sitting near a window. This happens when it is cold out side and the TV tubes are HOT. A very cold gust of air leaking around a window or seam can cause the tube to shatter and implode..then explode [img]smile.gif[/img] This happened to us when I was 8 or 9, luckily we were all far enough away that the glass didnt reach us...it was durring the TV show Flipper.....poor flipper whent BOOOOM! </font>

<font color="#cc9999"> Yep, looked it up. The flyback transformer supplies the 20 -75 kilovolt deflection current that moves the electron beam back and forth accross the screen. [img]smile.gif[/img] More than anyone wanted to know I bet [img]smile.gif[/img] </font>

That is EXACTLY what it is! Not many people know this! But I need to add that this loosening can cause the fly-back to overcharge--you WILL know when this happens, you will hear a god-awful LOUD crackling sound, turn it off FAST before the circuit board in the Monitor (or a TV) gets overloaded as well.

I've installed new fly-backs in my 27 inch TV a few times (part costs around $20) compared to the $150 a repair shop charges--DO NOT ATTEMPT THIS yourself unless you know how to drain the charge out of the TV. tube, because those hold a few AMPS which kill VERY quickly, even if it's unplugged for a week, it still holds a charge.

But a friend of mine taught me this and I bought tools to do this.

Keep an ear to the sound--if the noise gets louder, it's getting worse, and you should take it in for 'primitive' repairs, or just buy a new one since the cost of repair shops charge as much as a new one would cost these days. :(

[ 09-12-2002, 04:09 PM: Message edited by: Ziroc ]

They don't explode, the implode. :D (Tubes implode because it's the TV tube is in a vacuum)

They don't explode, the implode. :D (Tubes implode because it's the TV tube is in a vacuum)</font>[/QUOTE]<font color="#cc6699">Well technically [img]smile.gif[/img] they implode first but then they explode [img]smile.gif[/img] We had glass three feet away from the tv [img]smile.gif[/img] . I never heard of a flyback going that far out of whack [img]smile.gif[/img] .....usually I just replace the TV or monitor when it reaches the point where the sound is driving me insane [img]smile.gif[/img] .

Jeez Z. I didnt know you knew how to use a soldering iron [img]smile.gif[/img] kind of a lost art, now its easier to just buy a new item rather than fix it.</font>

[ 09-12-2002, 07:04 PM: Message edited by: MagiK ]

<font color="00cc99">Righty then, so it is nothing to worry about.. for now. That is good because I just had to falk out a massive repair job on my car engine and don't have much money left :S

I think I'll get a new monitor when I can afford one. *Nice 21-inch monitor appears in my head* :D [img]tongue.gif[/img]
thanks Magik, Ziroc and Megabot [img]graemlins/thumbsup.gif[/img] </font>

<font color="#ff6699">Don't turn your nose up at a good "used" 19" or 20" monitor. They are pretty plentiful here in the DC area ..I think they get them from failed businesses [img]smile.gif[/img] or perhaps when the boss decides to upgrade to that 50" wall mounted unit ;) Im using a "used" 19" Optiquest V95 on my secondary PC at home right now..got it for $150.</font>