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Hitachi 19" CRT monitor display twitches and shrinks when hot

I have an Hitachi 19" monitor that has served me well since 1998. But lately, after I'm using my PC for several hours, it will make a slight noise after after which the screen will start shrinking for a second or two, and then it pops back to normal. Though I've degaussed it several times, the problem persists. So, I'm beginning to think my monitor is either overheating or is on its last leg. I was wondering if the 10 years of dust buildup inside the monitor might be the culprit, and I was thinking of taking off the cover and blowing the dust away with a PC duster if it would help. Also, this morning when I moved my mouse to wake up my monitor from power-save mode, it made a moderately loud snapping noise. I thought it had died, but was quite relieved when it didn't.

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  • netbids Dec 10, 2008

    Thanks to both of you for posting. I guess it's worth trying the suggestion of resoldering bad joints. I just need to find a local shop here that won't overcharge me. If it solves the problem, I'll keep using because this monitor has not decreased in quality at all that I've noticed. It was the best 19" monitor available at the time. The picture is still sharp, and the colors are still great. If resoldering doesn't work, at least I can say I tried. Thanks again!



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I would beg to argue with the lifespan of CRT's. 8 years with decreasing quality after 4? Are you buying Sceptre and Komodo monitors?

CRT's should last 10-15 years. Look at my 21" Compaq P1210 from '95 - still going strong @ 2048x1536x72hz.

It seems the most common advice for problem equipment is to just replace it, but I disagree, especially in this economic climate.

I would be willing to make a bet that your fly-back needs to be replaced.

Find yourself a mom and pop shop that specializes in monitors. Shouldn't cost more than $50.

Posted on Feb 15, 2009

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Sorry Jamess02, the problem at this point is bad solder connections. The snapping you are hearing are sparks jumping the gap. If this is not fixed soon, there will be permanent damage done that will not be worth the repair. Any shop can fix this ion about 10 minutes. Simply open up the unit and resolder any connections that appear grainy or have rings. Please note that there are dangerous high voltages present even with the unit unplugged that can cause injury.


Posted on Dec 08, 2008

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It sounds like it is on it's way out. The lifespan for a CRT Monitor is about 8 years (at most) witha  noticeable decrease in quality at 4-5 years. I have seen them last longer, but not much. I would recommend getting a new 19" LCD which can be purchased right now for under $125 online. (Still 200 at Retail store) Opening it up to clean it out is not advised. (the dust could be the only thing keeping it alive) JK
Good Luck!

Posted on Dec 08, 2008

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