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Monitor making a "pop" noise and image "flickering"?

post #1 of 16
Thread Starter 
Okay, first of all, the monitor in question is an IBM P275. It's a CRT.

My monitor recently made this slight "pop" noise. It's done before, but it's been very rare (I can probably count the times it's happened on one hand in the three plus years I've had it). It's not loud at all, and sounds like it comes from the back of the monitor. The display "flickers" or "cuts out" when this happens. This all happens in like a split second. Afterwards, it's like it didn't even happen. There's no loss of focus or anything.

Again, it's only happened very rarely, maybe like three or four times or so in the three years I've had it, but it just happened now, so I figured I'd at least research it and inform myself in case it might be something bad (better not be!). I've ignored it until now due to the rare occurrence of it.

Does anyone know what this could be? I'm doing some searching via Google and some things are ranging from dust causing it, to failing flyback transformers (?) to failing power supplies. I'd place my guess on either of those things before an actual failing tube, since the focus/picture doesn't seem to actually distort in any way. It just seems to cut out from a very momentary cut or lapse in power, but again, I don't know fully what I'm talking about, hence I'm asking.

Should I try dusting it out (and how)? Is it (potentially) failing? Should I ignore it?
post #2 of 16
I doubt it's "failing", to be honest, because usually, in my experience, the issue would increase over time. But honestly, it could be anything. Might just be a wire being a bit iffy, or maybe the power socket, or the AV plug in your PC. It's really hard to say if the issue is this... Minor.

Could try dusting it out. If the monitor has screws, remove them and get some canned air in there. I don't know how those monitors look like, or how they're set up, but I doubt it's really hard.
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post #3 of 16
Well, howdy!

Sounds like a capacitor blew. Open 'er up and take a look.
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post #4 of 16
Just don't seperate the plastic enclosure attached to the front glass of the monitor....
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post #5 of 16
Thread Starter 
So which part of the case is safe to remove? I think I might want to dust it out.

It just did it again. Something else that just crossed my mind is that, I believe all but one of the times it's happened, have been relatively close to after first powering it on (after it's been off for a while), if that gives any indication as to what it is.
post #6 of 16
I had a problem with my LCD monitor, the display wouldn't stay on when powered on after 1 hour or more, it would flicker then turn off until i powered it on 10 times.
The problem was 4 bad caps, i replaced them and it works perfectly.
However you have a CRT so i don't know if that would be relative at all, but i guess you could look for bulged caps
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post #7 of 16
I swear, more and more monitors are dying daily. Give this tut a look through. Monitor Repair/Capacitor Replacement Tutorial

Edit: I should learn to read first then post.
Maybe something isn't grounded properly and is causing a short. Or It very well could be a cap. I wouldn't take it apart if I were your. CRT store a ridiculous amount of energy and can/will kill you if you don't handle them properly.
Edited by animal0307 - 6/23/11 at 10:38pm
post #8 of 16
Thread Starter 
Thanks for the advice all. I'm still sort of searching for feedback on this.

It did it again today (I didn't see it, but as I turned my PC on and was walking in a few minutes later, I heard it). I noticed this does indeed seem to happen only after the monitor has first turned on. If it's been on for a while, it never happens.

Again, does this clue anyone in on the cause?
post #9 of 16
Thread Starter 
I'm going to have to bump this back up.

This has become a common occurrence, now happening every time I turn I monitor on, roughly five to ten minutes afterward.

Not only that, but rather than just making the pop and continuing on like nothing happened, in the minutes before it happens, my screen is "shimmering" and "tearing", not unlike it does when you're playing a game at a frame rate well beyond your refresh rate.

As a third symptom, and it only just now did this tonight, for about three seconds, give or take, it went "out of focus" and got really blurry (perhaps not unlike it'd look with the vertical convergence set a bit off, although the color wasn't out of convergence, just the focus was).

It's definitely getting worse and I know a failure is incoming. I still find it funny that once it finally "pops", it is 100% stable, but before it does "pop", it isn't. It is definitely related to it warming up.

Anyone know what this is? I'd like to take action if I can and if it's practical. I have a feeling one of these days it'll "pop" and then instead turn off for good.
Edited by Princess Garnet - 7/19/11 at 10:14pm
post #10 of 16
Switch out the monitor, see if it persists. If it does, it rules out problems with the monitor and you need to look at cables and sockets. If it doesn't... Well, it's dying, I'm afraid. I doubt there's much you can do to pinpoint the actual problem.
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