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World Community Grid Forums
Category: Retired Forums
Forum: UD Windows Agent Support [Read Only]
Thread: Wavy screen problem at high CPU utilization |
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Thread Status: Active Total posts in this thread: 19
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
rbolo29, you can edit your posts for up to 2 months after you write them. Make sure you're signed in. You can only delete your posts if nobody has replied to them.
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
hmmmm walking thru a radar beam.....not very healthy,
----------------------------------------and yes u can edit/delete posts if u are a very experienced cruncher (if u r logged in), hit that little icon next to the title next to your post. Deleting option is far right of title, but only works if noone has replied to your post......u can still empty it up to 60 days from original posting date. smells btw that the already mentioned temperature is an issue, which then wonder if the fan are working proper. If WCG kicks in, temps jump acutely and also drop pretty quick. The Norton training takes a bit longer to reach the critical temp point.....damaged wiring inside (read something about a perpetually expanding / shrinking part eating its way thru insulation). Swieker, have u tried swapping monitors with a unit that u know is not affected....then u know its box internal or CRT. Edit: Rbolo29, do u see i edited 2 times? Probably u can from post 51 ;>)
WCG
----------------------------------------Please help to make the Forums an enjoyable experience for All! [Edit 2 times, last edit by Sekerob at Oct 22, 2006 7:07:31 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Google: Wavy computer screen
http://www.mea.or.th/emf_web/emf_eng/webpage_eng/page11_eng.htm " * Computer monitors are very sensitive to magnetic interference. Magnetic interference is common with fans, large electrical circuits, circuit breaker panels, etc. Position video displays away from fans or circuit breaker panels. If the monitor appears wavy, move it and see if the problem persists. * Computer monitors also interact with fluorescent lighting. The monitor will appear to flutter. The video monitor settings in the operating software (Windows) allow you to change the display modes to 60Hz, 70Hz, 72Hz, 75Hz, 85Hz. The 85Hz appears to work well with office lighting. Your computer vendor can help you change these settings. * Does your computer restart without warning? While computers are fairly tolerant to voltage changes, they will restart if the voltage drops significantly. Put sensitive equipment on its own circuit breaker and protect sensitive equipment with Uninterruptible Power Supplies (UPSs) and Surge Suppressors. * Computers and monitors can also be sensitive to strong radio interference. Do not place your computer or monitor near a strong signal source such as a radio transmitting antenna. Even the small Family Radio Service (FRS) radios popular today can cause interference. Cell phones have not been a problem to date." |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Google: Wavy computer screen http://www.mea.or.th/emf_web/emf_eng/webpage_eng/page11_eng.htm " * Computer monitors are very sensitive to magnetic interference. Magnetic interference is common with fans, large electrical circuits, circuit breaker panels, etc. Position video displays away from fans or circuit breaker panels. If the monitor appears wavy, move it and see if the problem persists. * Computer monitors also interact with fluorescent lighting. The monitor will appear to flutter. The video monitor settings in the operating software (Windows) allow you to change the display modes to 60Hz, 70Hz, 72Hz, 75Hz, 85Hz. The 85Hz appears to work well with office lighting. Your computer vendor can help you change these settings. * Does your computer restart without warning? While computers are fairly tolerant to voltage changes, they will restart if the voltage drops significantly. Put sensitive equipment on its own circuit breaker and protect sensitive equipment with Uninterruptible Power Supplies (UPSs) and Surge Suppressors. * Computers and monitors can also be sensitive to strong radio interference. Do not place your computer or monitor near a strong signal source such as a radio transmitting antenna. Even the small Family Radio Service (FRS) radios popular today can cause interference. Cell phones have not been a problem to date." ** Nothing about being in the military is necessarily healthy although higher-ups usually claimed "I could be plastered to the radar dish all day and it wouldn't cause me any harm". How nice! I don't miss it! |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Nothing about being in the military is necessarily healthy although higher-ups usually claimed "I could be plastered to the radar dish all day and it wouldn't cause me any harm".  Try that with one of my old HAWK radars and you could get a cylindrical section of your body lightly cooked (though not instantaneously). The much weaker VULCAN anti-aircraft radar would be safe. |
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Dirk Gently
Senior Cruncher England Joined: Mar 1, 2005 Post Count: 153 Status: Offline Project Badges: 
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I'd go with Depriens suggestion about a dodgy PC PSU.
----------------------------------------Running some other CPU intensive programs would clinch it - you say you have already found Norton causes same effect. I am assuming you are not using a digital output video adapter and monitor. Analogue video is susceptible to level - and hence susceptible to voltage ripple on supply lines. Digital signals are only affected once the variation is bad enough to cross the logic threshold. At this point your PC would be crashing. PC PSUs are not always all they are cracked up to be - take a look at the PSU reviews at Toms Hardware. I found this out recently because I had problems with mine - and it eventually went BANG! New one ( different manufacturer) is OK. I think I heard HP ! This may mean paying through the nose for a replacement if you are out of warranty. But the big manufacturers with reputations are more likely to listen if you have a good moan - if you need any help with the moaning let me know (expert)  ---------------------------------------- [Edit 1 times, last edit by Dirk Gently at Oct 22, 2006 11:35:18 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Burn In Test(B.I.T)
PC Reliability and Load testing for windows. http://www.passmark.com/products/bit.htm Have a good day! |
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RT
Master Cruncher USA - Texas - DFW Joined: Dec 22, 2004 Post Count: 2636 Status: Offline Project Badges: 
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Sounds like it is not a WCG problem. A good procedure would be as someone above suggested, to swap out the monitor and see what happens. If it continues, put the old monitor back on and change cables, if it continues, check the environment. Is there anything new (electrical or electronic) around that could be doing it?
----------------------------------------If this does not solve it, then it likely is in the computer itself. The first and easiest thing to do is to take the cover off and after taking it outside, blow all the dust and whatever out of it. If that doesn't do it, then I like the idea of the mfgrs help desk. As others have pointed out above, it could be several different things in the computer. My limited experience would suggest it is either the Video card or the PSU getting too hot as suggested above. Too many possibilities to explore until you start eliminating things as possible causes. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I have had wavy CRTs under 2 different circumstances. First, I had some device near the screen that the monitor shielding was not strong enough to prevent interfering with the display. Second, the CRT was wavery for a few days, then gave a sudden pop and burnt out inside. So that was caused by a failing CRT component.
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