Tekforums

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Damn screen keeps twitching!  :shock:

What happens is this; every so often the width of the display seems to squash horizontally.  Not by much - about 20-30 pixels or so - but its damn annoying when Im trying to do precision graphics work.

Is the monitor on the way out?  Im assuming its a problem with the guns?

:)

Did you degauss and move those big honkin magnets from your desktop?

Yes beware of strong magnetic fields around the monitor a table fan next to a monitor can give strange patterns :)

On a serious note u said it "squashed" is that from bottom and top or from the sides ?

make sure your mobile phone is a good distance away also

any hint as to the type of monitor?

LCDs often do this idf you have the use high frequency for large displays set.  CRTs do it when they get a field near them (mobile phone, switching supply, etc).

Sounds more like a driver thing and your graphics card than the monitor if its an LCD

from what youve desribed if youve not introduced any more magnetic fields near the monitor then id say its on its way out.

had a mitsubishi diamatron 930b (i think) start doing peculiar stuff like you describe, its not sitting in the store room at work, got another iiayama 454 in its place

If under warranty then Bash with a hammer and rma.

If not under warranty get a new one.  

maybe upgrade to an lcd if you plan of replacing it for being faulty?

the biggest coincidence is with me, if you all read the thread about dabs.com shafting me with the lcd montiro i bought... then listen to whats even wierder. They refunded me the full amount this morning, but last night my NEC multisync CRT started flashing, and blurring randomly, that is just incredibly strange.

:(

its a conspiracy I tell you! Dabs have taken their revenge upon you by remotely initiating your old monitors auto destruct system.

Cheers fellas. :)

Its a CRT (Hitachi CM752ET).  The twitching is only periodical, every 10-15 mins or so and its horizintal (i.e. the sides get squished).  Frequent enough to be damn infuriating.  :evil:

Theres no magnetic fields nearby or phones etc.

Graphics Card?  Please dont say things like that!  I dont have the budget for a high-end one like I have now and Id much rather get a new monitor than another megabux GC.  :-)

If I go down the replacement route, itll be CRT again - LCD just doesnt quite dont cut it yet for photo/graphics work :)

Any recs for a spiffy 19 incher?  :twisted: NB: Dont want that hideous twin horizontal line thingy that the early LaCies had. :(

:)

Dell 30" LCD is as good as it gets.

clicly (http://accessories.euro.dell.com/sna/productdetail.aspx?c=uk&l=en&sku=52657&category_id=6198&first=true&s=dhs&cs=ukdhs1)

Should give most of the geeks on here damp pants...

Sounds like it could be just your frame coils going a bit doolally.

Go find a tv repair techie guy, and get him to have a look at it. Dont get it repaired by a "computer repair guy" as theyll just ass rape you for it.

Can  be high voltage coils and there is a big transistor I forget the name of that can be bad :)

Time for the Bay... (CRT) - LCD isnt the way forward for me. :)

Findings:

When switching between refresh rates of 85Hz and 75Hz, I can reproduce the symptoms every time.

So, it seems that the monitor is switching refresh rate on its own (from 85Hz down to 75Hz and back up again to 85)... what dya thinks causing this phenomenomemonenom then?

WinXP being a dick?  Faulty cable/connector? Hmmm... :?

 :?:

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Check cables, see if it ever happens at 65-70 Hz or at 90 Hz

aye cables. Im still an advocate for taking it to a TV repair guy :)

If you have one available try it with another computer first though, just in case, it might turn out to be something else such as the computer PSU ;)

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:(

Phones?, Coils?, Magnets?, PSUs?... :(  Ya just dont know where to start these days...

 :cry:

Coils and Magnets = Same issue. Frame Coils = Large electromagnets (Coils) that spread the picture out from the electron gun in a CRT. Without them youll get the classic Horizontal Line, or Vertical Line, or really bright white dot.

PSU... dont see how it would affect it unless your graphics card has an additional tie in, and only supports certain ress when full power is given to it.

Cable it could be, or a dodgy unseated graphics card. :D

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This isnt looking good.

Ive now noticed occasional horizontal artifacts (like very brief tearing) across the screen.  (Theyre extremely fine though and very fast - and they only seem to appear when the monitor is warming up).

Its the graphics card isnt it?...  :thumbdown:  :cry:  :cry:
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If you think its the graphics card then try it on a different monitor

Ive reseated the card, given the case a good ol dusting and reattached all cables etc.  Ill run that for 24hrs and see what happens.

I wish I had a spare monitor to hand. :-)

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Arses.  Ill just get a new monitor - if I can find a good CRT on the Bay...