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| Thread ID: 26751 | 2002-11-04 21:10:00 | Monitor Feeback?????? | aobrien (2444) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 95940 | 2002-11-04 21:10:00 | After recently moving house I found that my monitor image on screen was pulsing. I blamed it on feed back from a high tension wire over head and have tried to isolate the problem. I have had 5 other PC’s in the house to test and they were not affected and have swapped the graphics card and monitor. My local PC supplier advised me to get a aluminum case as stops the radiation and may work but am not sure if this is true and do not want to pay $200.00 for a case that might not work. Does anyone know if aluminum cases do stop feedback? |
aobrien (2444) | ||
| 95941 | 2002-11-04 21:58:00 | you might need to discribe exactly what u mean by "pulsing". are you sure its not just a refreshrate problem? installing a new (pc) case proberly won't do much unless your existing case is perspex/glass or has windows. i wouldn't use aluminum(except that it looks nice) as steel case is cheaper, stronger, and shields slightly better than aluminium (assuming same thickness). might be a wise idea to cheak the earthing of the powerpoints. |
tweak'e (174) | ||
| 95942 | 2002-11-04 23:26:00 | I agree with tweak'e on this one, make sure its not just running on a low refresh rate and causing the screen to flicker, otherwise check the earthing of power points, also make sure that you don’t have any non-shielded speakers around you monitor, or any plug packs etc as they can cause interference. As for the case, unless you’re using one of those fancy 100% acrylic cases, changing it wont make 1 iota of difference, (except keeping you local PC supplier (scamist) in business). Cheers Liam |
nz_liam (845) | ||
| 95943 | 2002-11-04 23:30:00 | Also checkout FAQ37 (pressf1.co.nz) Cheers Liam |
nz_liam (845) | ||
| 95944 | 2002-11-05 07:53:00 | thanks for that The monitor is flickering almost like it is in a pool a wavey water. I have checked the refresh rates etc and alll is the same as usual. I have found today though that all the other PC's I tested were notebooks and after bringing another PC home it's doing the same thing. So maybe a CRT problem???? dam anoying though I'll have to move again if I cant fix it. |
aobrien (2444) | ||
| 95945 | 2002-11-05 08:41:00 | Did you drop - or jar - the monitor or computer in the move? Have you tried a different monitor? Do the neighbours have problems as well? Perhaps try a borrowed monitor, check the monitor card hasn't worked loose, check the cable is tight. If the neighbours have problems - is it from the high tensile lines or dirty power to the house? Would a surge suppressor even out the power? |
Heather P (163) | ||
| 95946 | 2002-11-05 11:16:00 | The problem is nothing to do with speakers, cases, power point earthing or dropping the monitor. If the image is waving or shimmering, the cause is almost certainly external alternating electromagnetic fields from power wiring or similar 50 Hz sources. In order of ease of correction, the typical causes are: 1) Plugpacks (power bricks) installed behind or under your monitor 2) Appliances such as televisions or other constantly-on moderate power users on the other side of the wall. 3) Power wiring in the wall behind your monitor. 4) External powerlines, either above your house (high voltage) or outside in the street. The latter is a common problem in inner-city or older areas where houses are right on the street with the power lines just a couple of metres away. Try turning off all power except that to your computer (start with lights as they are a common cause, especially if you have two-way switching) and see if you can eliminate possible causes. If the interference source is external to your house or beyond your control you have two options, either buy an LCD monitor or get an electromagnetic shield for your existing monitor. Neither option is cheap unfortunately. You could also try setting your screen refresh rate to 75 or 85 Hz as the movement you see is the beat frequency between the 50 Hz mains supply field and the refresh rate of your monitor. It can be as low as 10 Hz for 60 Hz refresh rate and that is really objectionable. If you want (free) professional advice and assistance, post a message to pacemakerbt@hotmail.com and I'll reply with contact details. Tell me you have posted a message via this thread as I don't check that mailbox very often. Cheers Billy 8-{) |
Billy T (70) | ||
| 95947 | 2002-11-05 19:33:00 | I have posted to pacemakerbt@hotmail.com and would really appreciate any help you could offer. Try typing while your monitor is moving - gives a good headache | aobrien (2444) | ||
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